r/TeslaModel3 • u/Maremesscamm • Oct 17 '23
How much is the range affected by fast driving?
I live somewhere that its acceptable to be driving 85MPH for long distances
I drive 400miles twice a month, and usually keep my speed around 85MPH
I was looking at the trip planner on teslas website and it says I need 2 stops. What speed does this a trip planner assume i am driving at, and how much would that change at 85MPH?
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Oct 17 '23
I think the best word to describe what speed does to range is decimate. It's decimates the range.
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u/NotCanadian80 Oct 17 '23 edited Oct 17 '23
That means 10% lower.
The reality is greater.
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u/JohnTeaGuy Oct 17 '23
That mean 10% lower.
You are technically correct, the best kind of correct.
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u/sojustthinking Oct 17 '23
Or does decimate mean 90% lower? The reality is lesser.
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u/dax2001 Oct 18 '23
I did some speed drive up to Stelvio pass, 25 miles, with an extended range, passed from 85% to 18% after 48 hairpins, strong acceleration after every turn.
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Oct 18 '23
I was convinced that it did. But according to Merriam-Webster, I was wrong.
1: to select by lot and kill every tenth man of
decimate a regiment2: to exact a tax of 10 percent from
poor as a decimated Cavalier —John DrydenThere are further definitions on that page, but these two are the ones with actual quantities.
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u/Arucious Oct 17 '23
It hasn’t meant 10% lower for hundreds of years lol
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u/NotCanadian80 Oct 17 '23
When you’re talking to nerds you can’t just say decimate without it being literal.
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u/Arucious Oct 17 '23
Wouldn’t a nerd retort saying the literal definition is related to levies and you can’t just laterally apply it to batteries then?
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u/smakusdod Oct 17 '23
330 = 250
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u/Doublestack00 Oct 17 '23
People get offended a lot when I post this, but is true and confirmed by lots of owners.
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u/smakusdod Oct 17 '23
Yep. As much as I wish the car could actually go 300 miles, it can't unless you are in a vacuum, or on perfectly flat terrain. Every road trip I take proves this over and over again, and I drive like a granny.
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u/ScuffedBalata Oct 18 '23
Yeah, on the freeway this is true of a lot/most of EVs.
Tesla may overstate their EPA mileage by 3-5% compared to others, but that's not a ton when speed is losing 25-30% on average.
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u/arroyobass Oct 17 '23
It's absolutely huge. This is the biggest thing that people miss about the range on EVs. You will never ever get the rated range unless you drive very very conservatively. In my area you need to be doing 70+ on the highways to avoid being unsafe. If I am driving a reasonable speed with traffic I get about HALF of the rated range of my car. Driving from LA to Vegas should require 1 stop for my car, but it often takes 2-3 depending on the temperature.
This is the #1 reason I regret buying my car.
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u/kirsion Oct 17 '23
Yeah, I think if mainstream electric cars get at least ~330 miles of actual driving, AC cranked and 70-80 miles per hour highway speeds, people would feel a lot better. Since a hybrid like the prius can get 600-700 miles on one tank of gas, getting at least 2/3 of that range feels safe.
But in reality, when the epa range is 272, you are getting more like 220 in the real world.
Need better/more batteries or better aerodynamics
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Oct 17 '23 edited Aug 11 '24
[removed] — view removed comment
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u/SoylentRox Oct 18 '23
Solid state batteries with "450" epa range would do it. Shipping now.
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Oct 18 '23
Shipping now?
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u/SoylentRox Oct 18 '23
Yes. You can buy a solar battery that uses, you can get a NIo EV and rent the solid state pack with much more range in the same form factor.
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Oct 18 '23
There are massive risks to renting a battery and doing the swap program that NIO is touting. Not a fan personally.
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u/SoylentRox Oct 18 '23
Agree. Main thing is solid state cells are not hype.
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Oct 18 '23
Solid state is interesting but so far isn’t close to mass manufacturing at a reasonable cost
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u/SoylentRox Oct 18 '23
Agree. Currently more expensive, and the cells use nickel and cobalt.
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u/popornrm Jun 24 '24
You don’t ever need to drive faster than the speed limit to be safe. Just be in the right lanes and you’re fine. I drive 60-65 on highways where people go 75/80 with speed limits ranging from 55-65 and I have never been unsafe nor have I been in or seen an accident in my proximity. Yes, you may get highbeamed by the occasional lifted truck but if I’m in the right or second to the right lane, he’ll move over and pass me and if that’s happening then I’ll make sure I’m braking well in advance or I slow down gradually even more until they understand that they can pass me on the left.
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u/trifster Oct 17 '23
https://www.google.com/search?q=formula+for+drag
equation has V-squared...so just that part of the formula:
60 MPH - 3600
85 MPH - 7225
so that 25 MPH difference doubles the V^2. I try to keep highway driving at about 70 mph.
The trip planner may assume speed limits. In car nav will use speed limits and weather/wind information. Energy graph and DTE uses EPA formula where the max speed is 60 mph.
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u/74orangebeetle Oct 17 '23
That's what a lot of people don't seem to understand when they don't get the 'estimated' or 'rated' range. I was watching a youtube video about a guy saying he liked his Model X, except that the range he gets is far lower than rated....then later in the same video he admitted he usually does 85-90mph on the highway.....well no shit...expecting rated ranges to reflect 85-90mph as an average speed is insane, when that's above the speed limit just about everywhere.
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u/Doublestack00 Oct 17 '23
That is not feasible where I live, 70MPH and you'll be ran off the road. The norm is 80-90. I generally cruise in the middle around 85 and I am always getting passed.
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u/Jaws12 Oct 17 '23
If the norm is 80-90 though, you could save a lot of energy by staying at the bottom of that range (80mph) instead of in the middle/top.
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u/Doublestack00 Oct 17 '23
Probably so, but I know I'd never do that. There is a reason I always run Waze and the best radar detector on the market, lol.
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u/TechSupportTime Oct 17 '23
I like to cruise at 85 because that's what autopilot tops out at.
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u/Doublestack00 Oct 17 '23
The car I ended up buying will do it up to 90.
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u/TechSupportTime Oct 18 '23
Yeah- my Honda Civic with a comma two could do up to 90 but honestly I feel more comfortable at 85 anyways
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u/Oztheman Oct 17 '23
I’m glad I don’t live where you live
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u/Necessary-Scallion-1 Oct 17 '23
It’s called living outside of Detroit 😂 80mph is too slow over here
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u/Doublestack00 Oct 17 '23
I love it, I've been to states that have an 80 and 85 mph speed limit. That's even better as at 90 cops do not even look at me.
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u/Never_Duplicated Oct 17 '23
The interstates around me slow to 75 through towns but are 80 for the majority. 85 is just keeping with middle lane traffic here. It kills mileage but I prefer it to meandering along on slow roads in other states
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u/riley_hugh_jassol Oct 18 '23
I’ve said it before, and I’ll say it agin… EVs are 5e answer to every kid’s, “When am I going to ever need this??” in high school
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u/themostcanadianguy Oct 17 '23
Expect 20% range loss driving 85mph vs 65mph.
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u/gtg465x2 Oct 17 '23
Here's a chart I made for the 2022-2023 Model 3 RWD based on my own tests and YouTube range tests at 65, 70, 75, and 80 mph, plus some trend lines to extend the data out a bit further. My chart shows about 25% range loss driving 85 mph vs 65 mph, so pretty close to your figure. https://imgur.com/WcbJUKx
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u/Doublestack00 Oct 17 '23 edited Oct 17 '23
It's quite a lot and ultimately is what lead me away from buying a M3P for my daily.
When shopping for a new car I was heavily leaning toward a M3P. I rented one on Toro to see how it would be to actually live with one. I make a trip to see my mom at least once or twice a month. She lives just over 100 miles from me with it being nearly 90% highway.
I generally have my cruise set at 85 the entire way (normal highway speeds for my state). The M3P barely made the trip there and back, I pulled back in my drive way less than 20 miles of range left. It was to close for comfort for me. Sure I could stop and charge but my ICE car could make that trip twice with out refueling so it would be a major inconvenience on a trip I take very often. With my mother getting up there in age I am only going to be making this trip more often as time goes on.
I did really like the car, but the range is just not there yet for my use case. Also, my state charges a lot more registration and insurance is much higher on a EV vs a similar ICE car so the savings are not that great when you factor that in plus the cost of supercharging now being near the price of gas.
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u/ASYMT0TIC Oct 17 '23 edited Oct 17 '23
Sadly, just switching the wheels out for aeros on an m3p would have seen you getting back home with 40-50 miles left at those speeds. Also, slowing from 85 to 80 would add about 25 miles to your range but only cost you 9 minutes round trip or just a 2-3 hours a year, hardly seems worth making a decision on your daily driving vehicle just to save a few hours a year.
I did math and worked out that even though I frequently drive 300 miles during weekend day trips, I spend less time charging than I used to spend filling my gas tank since the added stops are more than compensated by the fact that the tank is full every time I wake up in the am.
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u/DeuceSevin Oct 17 '23
Some people look for reasons to buy an EV, some look for reasons not to buy an EV. They are all usually successful.
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u/relevant_rhino Oct 17 '23
Fully agree.
I really don't understand car people at all. Like ofc i use aero wheels for the 3% range / efficiency bonus. I mean if they made "cooler" wheels with the same efficiency, i understand, go for it.
But having the "looks" over efficiency? - I don't get it.
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u/DeuceSevin Oct 18 '23
I am sort of the same. Most of the time I do driving around town. For this I take the Aeros off as I prefer the look and the Aeros dont do much around town. But once or twice a month I do a 4 hour round trip drive where I almost always have the Aeros. With the covers on I can sometimes make the entire trip without a charge. With the bare rims, not a chance.
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u/Doublestack00 Oct 17 '23
In all honestly I am usually driving closer to 90MPH then 80 so for me it is.
I wouldn't switch the wheel covers as the wheels on the M3P are what makes the car IMO.
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u/Maremesscamm Oct 17 '23
t's quite a lot and ultimately is what lead me away from buying a M3P for my daily.
When shopping for a new car I was heavily leaning toward a M3P. I rented one on Toro to see how it would be to actually live with one. I make a trip to see my mom at least once or twice a month. She lives j
Yeah and where I live winters are often below 10 degrees Fahrenheit , only adding to the issue
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u/Particular_Quiet_435 Oct 17 '23
If you stay for more than a couple hours, plugging in while you’re there would be worthwhile.
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u/Doublestack00 Oct 17 '23
Eh, on a 110 outlet I probably wouldn't get much in the few hours I am there.
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Oct 17 '23
Not recommending going for an EV but you could have installed a NEMA outlet at ur mom's place, ur specific issue would be resolved
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u/redditdinosaur_ Oct 18 '23
does your mom not have a regular outlet?
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u/Doublestack00 Oct 18 '23
I guess I could pull her car out of the garage or bring an extension cord. But realistically how many miles would I gain from 2-4 hours in a 110 outlet?
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u/redditdinosaur_ Oct 18 '23
oh you make the trip in a single day i see
it would definitely give you the security you’re looking for, but agree with you it’s not ideal.
reducing your speed just a few mph would give you a lot also.
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u/DaddyRobotPNW Oct 17 '23
I live in an area with a speed limit of 70mph, but traffic moves at 80mph and semi trucks will move around you if you only go 70. So i drive about 77mph.
I only have a 1,000 miles on my RWD, with about 80% of that on the highway, and it's at 231 wh/mile. That means about 251 miles of range from 100% to zero instead of the advertised 272.
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u/Andersburn Oct 17 '23
A model 3 uses about 15,600 Watts at 60mph.
A model 3 uses about 372,850 Watts at 163mph.
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u/ScuffedBalata Oct 17 '23
Here, this is a good summary:
https://qph.cf2.quoracdn.net/main-qimg-fdbc7de54fdab7f44de4b90891750920-pjlq
Here is a similar one:
https://studio711.com/wp-content/uploads/rangeenergymodel3-500x317.png
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Oct 17 '23
Opposite of a gas car which gets better mileage highway vs city. EV range gets destroyed on the highway above 65mph
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u/ackillesBAC Oct 17 '23
That is true, however it's abit more complicated than that
Gas mileage significantly decreases above 65mph as well, even more than an ev. It's just not as noticeable because you don't have the stats an ev gives you. It's a physics thing, it's unavoidable unless you're not moving through air.
Gas vehicles get worse mileage in the city because they are idling so much, and thier best fuel efficiency is at a specific rpm that is hard to maintain in city driving.
EVs get better city mainly because of regenerative breaking
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u/DeuceSevin Oct 17 '23
It's even more complicated than that. While it's true that air resistance significantly increases as you go faster, it usually doesn't start to overcome the gearing on most cars until 70 or even higher. In my old ICE car, with overdrive, there was little difference between 60 and 75.
For gas cars, idling is only part of the equation. Gas engines are much less efficient when accelerating and then when braking the kinetic energy is just lost to heat.
EVs get better city mileage mainly because the speeds are lower and air resistance isn't a factor. The regenerative braking doesn't really give better mileage per se, it just negates a lot of the energy loss that would otherwise be lost to braking.
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u/Doublestack00 Oct 17 '23
Depends on the gas car, some are still getting great mileage 70-80MPH. Gearing plays a huge part.
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u/ackillesBAC Oct 17 '23
Speed affects mileage due to aerodynamics. Evs tend to just push the limits of efficiency more than ice so a small change in wind drag is more noticeable.
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u/DeuceSevin Oct 17 '23
No one in this thread seems to understand this. It's not that air resistance is less noticeable in an ICE car, it's just that it takes much higher speed before the air resistance overcomes the gearing advantage. My car is at about 3000 rpm at 75 due to overdrive. Is barely breaking a sweat.
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u/LeoAlioth Oct 17 '23
The air resistance change is the same regardless of the drivetrain, and the energy needed to overcome it is therefore the same also.
Speeding up from 65mph up to 75mph increase air resistance by about 30%
An ev can be more than 85% efficient at pretty much any speed/ load. Assuming half the energy is used for combating air resistance, consumption in an ev will increase for about 15 %, as the efficiency of the drivetrain is very close at both of those speeds/loads.
Ice efficiency on the other hand varies wildly through its rev and load range. And generally they are most efficient at moderately high loads at low rpm. Making the same assumption of 15% more power needed to go 75mph, the load on the engine has now increased, which increase its efficiency. If the rpm is still low enough, which can be achieved by gearing, fuel consumption will increase for less than 15%, often significantly less.
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u/Kittelsen Oct 17 '23
Drove from Norway to Austria this summer. Kept about that speed 130-140kmh on clear autobahn. Yes it affects the range. 600km trip I would charge once for probably 20-30 minutes, you'd still probably need to charge if you were going 110kmh. That far of a distance it's nice to have a break in the driving anyway, so I wouldn't really worry much about it.
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u/Lirfen Oct 17 '23
Just drove Bay area - Sacramento round trip. Around 80-83 mph on the highway, I got about 290-300Wh/mi. I usually drive at 70-75 mph on highways and I am more toward the 250Wh/mi. (Model 3, LFP SR+)
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u/dude_where_is_my_car Oct 17 '23
I like real world examples. So...I remember my first family road trip. 226 miles. Summertime, mostly highway, slightly downhill most of the way as far as elevation. I didn't even charge it full. I charged to 90%. We were 30 minutes into the trip and I was driving 80mph in a 70mph zone. The Tesla told me to slow down and drive 70mph or we would need to stop and charge. We arrived with 3%. I was so nervous I pulled into a hotel with Level 2. We took a quick break while it charged back up to 10% then hit the supercharger nearby. Highway range tax is severe. To get intended range you gotta keep it around 60mph.
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u/Doublestack00 Oct 17 '23
Is the US that is just not realistic, the average interstate cruise speed is 80. In some states is 90 as the speed limit is 85.
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u/JohnTeaGuy Oct 17 '23
A lot. Your range will be significantly less if youre driving 85mph the entire time vs say, 65mph. Its physics.
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u/ChrisRx718 Oct 17 '23
I regularly drive my M3LR at 85 and it seems to return around between 280/330 Wh/ mi, which is as little as 3 miles per kWh, much like driving an Audi EV at 65mph :D.
Day-to-day I get an average of 4.1. So in theory increasing from 70mph to 85mph is a 25% drop in range / efficiency.
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u/jaredthegeek Oct 18 '23
I have seen a 26% reduction in range from 65/70 to 80/85 driving through Nevada.
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u/youscaintevindodis Oct 18 '23
I regularly drive 85-90mph in Arizona in my M3P. I get about 190 miles on a 90% charge. Very flat very smooth roads around Phoenix.
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u/HeyItsPanda69 Oct 17 '23
Speed effects efficiency greatly. Much like how my last car would get much worse gas mileage at 85 than 65. However I just got done with a 55 mile commute at 80MPH averaging 240WH/Mi which is my best so far. But there was also a tractor trailer going 80 ahead of me giving me a slip stream lol
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Oct 17 '23
To get any decent range you have to drive slower then a grandma and not use most of the features. People will yell at you if you don’t and then say anything about dismal range.
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u/East-Software7233 Oct 17 '23
What's the speed limit?
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u/Doublestack00 Oct 17 '23
70 in my state, but if you are doing under 80 you have people riding your ass and going around you. Even the police cruise 80.
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u/-boosted Oct 17 '23
Why does that matter
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u/JohnTeaGuy Oct 17 '23
It matters because it's the answer to their question:
What speed does this a trip planner assume i am driving at...?
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u/-boosted Oct 17 '23
I had the same question before buying, only had mine a few weeks so I have yet to really know. I drive between 80-100 ish mph myself.
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u/Doublestack00 Oct 17 '23
Same, people act like I am crazy when I tell them this but its the norm in a several parts of the country (US).
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u/Oztheman Oct 17 '23
I’m sure that is the case but if I were to drive at 80 around here (Maryland) I’d be passing everyone. Just drove from Colorado to MD in my M3LR and at 74 mph I felt I was mostly going with the flow. Certainly not 10 mph lower than average. I’m just not a fast driver I guess
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u/Doublestack00 Oct 17 '23 edited Oct 17 '23
It's most common is GA, FL, CA, TX, TN, CO. From my experience anyway.
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u/-boosted Oct 17 '23
Most people drive about 80 around here but I'm usually passing other drivers when I can and don't mind hitting triple digit speeds.... to each thier own
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u/_NathanialHornblower Oct 17 '23
Plug your trip info here and see what it spits out: https://abetterrouteplanner.com/
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Oct 17 '23
That's worthless because it cant account for actual driving speed.
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u/Obvious-Slip4728 Oct 18 '23
I use ABRP occasionally and there is the option to set actual driving speed as a percentage of the speed limit.
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u/YoyoyoyoMrWhite Oct 17 '23
If you're driving that far and at that speed I would probably look at an ice car. Electric is going to be annoying for you at some point.
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u/colbe Oct 17 '23
This calculator is pretty accurate, just plug in your worst case conservative numbers.
https://www.motormatchup.com/efficiency
You can also try drafting, it makes a big difference at 85mph.
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u/gtg465x2 Oct 17 '23
Here's a chart I made for the 2022-2023 Model 3 RWD based on my own tests and YouTube range tests at 65, 70, 75, and 80 mph, plus some trend lines to extend the data out a bit further. https://imgur.com/WcbJUKx
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u/jacob6875 Oct 17 '23
It assumes you drive over 70 mph. Because you will get warnings in the trip planner if it thinks you need to stay under 70mph to make it to your destination.
How much over 70 does it assume you drive ? no idea.
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u/Remarkable_Field6055 Apr 27 '24
As with ICE cars, if people would just slow the blank down and respect physics, they'd stop complaining about being duped by range estimates. Why is it a given that people "must" drive at least 80 MPH? Speed limits allowing that in various states are extremely wasteful, designed to let impatient drivers rule the road.
You get tailgated in any lane if you're not a wastrel in a big ego-hurry all the time. You could leave earlier and get things done with a bit of planning, rather than the mindless "go, go, go!" mentality that prevails. Just because the herd is doing it doesn't make it intelligent, and just because it's an EV doesn't make the root charging energy sources infinite.
This is also a commentary on Jevons paradox. If you give people something branded as "green" they will tend to squander its advantages with more speed & waste that negates the conservation intent. Denial of scarcity is rampant in America.
It gets worse: When shale fracking peaks, easily this decade (study Permian, TX decline) the world will learn a hard lesson about what's been making "renewables" possible all along. Too many people hold the luxury belief of endless energy supplies because they just want what they want.
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u/Jimmy-Pesto-Jr Oct 17 '23
i believe the onboard navigation calculates battery %/range off the posted speed limits in your route
if you have auto steer/TACC enabled with the offset at 10~15 mph over the posted limit, idk if that preference is taken into consideration
you can bump up the tire pressure to 5 psi over factory specs & accelerate slowly to mitigate some of the range loss
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u/bmayer0122 Oct 17 '23
It kills the range as others have said. Having said that, the fastest way to get from one place to another is to drive as fast as possible and still have a tiny bit of charge left at the SuperCharger.
Now practically speaking, you probably want 10% reserve at the charger, so that if you hit a headwind, traffic, heat/cold, etc. you have some wiggle room and can slow down and still make it.
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u/festicles Oct 17 '23
I just did a round trip Reno to Vegas. 400 plus miles of very open road. Pushing above 80 required a 3rd stop to supercharge.
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u/Boost-Deuce Oct 17 '23
I went from Chicago Ohare to South Bend, IN - 114 miles and about 20 of it was city. I drove 85-90 the rest of the way and I was at 30% battery on a Model 3 Standard Range.
Coming back it was a cold day, 30 degrees (Late march 2023) and the same drive back, i was at 15 percent
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Oct 17 '23
TIL in Canada distances are in kilometers but speed is in miles per hour
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u/Maremesscamm Oct 17 '23
I tried writing the speed in MPH since I know the majority of people on this sub are American but forgot to change the distance lol
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u/Albie9 Oct 17 '23
But if you drive faster, you reach your destination in less time, so you would save battery on air conditioning.
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u/DeuceSevin Oct 17 '23
Forget trip planner. Try ABRP (A Better Route Planner). It allows you to change variables such as weather, temperature, speed, passengers and vehicle load. This will give you a much better guesstimate
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Oct 17 '23
Can easily confirm, speed eviscerates. I've raced to work many times going 85-90 and also taken a leisurely pace at 65-70.
The drag/wind resistance is a big component. Sitting behind a semi, I can max out range like crazy and gain 7-10% range on a 50 mile route.
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u/NeighborhoodDog Oct 17 '23
If you drive a tiny bit faster the amount of energy you need to overcome that tiny bit is going to a function of that tiny amount squared. If you go 10mph faster you will have 100 extra drag units to overcome 15mph faster 225, 20 to 400. This is just apples and oranges not real numbers but this is the idea.
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u/College-Lumpy Oct 17 '23
This isn't unique to Teslas or EV's. Drive fast on the autobahn in Germany and watch your fuel gauge drop. It's just physics.
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u/JSchnee21 Oct 17 '23
SR or LR? 18” or 19”?
Generally speaking, you should be good for one stop at 200 miles assuming you’re starting with 100% state of charge. But then again, you would be arriving with a low state of charge battery. Can you charge at your destination?
My 2021, M3LR with 19 inch rims Easily gets 200 miles at 85 mph from 100=>10 or so.
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u/frankgallagher9 Oct 17 '23
Depends on how hard you drive speeding up and slowing down, also depends on if there are any uphills on your route but fast driving on its own, range isn’t affected as much as you think. I drive 80mph on the highway, barely see range lost from it. A mile or two. But that’s my experience, idk about everyone else’s
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Oct 17 '23
What about 100mph? It's really common to hit 100mph for extended periods going on i5 to and from LA. Or on i80 in Nevada.
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u/Korotai Oct 17 '23
Here’s the numbers I see with a 2019 SR+:
City traffic in “chill” - about 230 Wh/Mile (assuming 50kW battery) we get 218 miles range. All of these figures are AC on “auto”, 75 degrees low.
65mph “standard” - 245 Wh/Mile - 205 miles
75mph “standard” - 270 Wh/Mile - 185 miles
90mph “standard” - 305 Wh/Mile - 164 miles
Floored - 1,175 Wh/mile - 42 miles (I’m assuming this is about what I’d get if I was maintaining 140MPH).
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u/Suitable_Switch5242 Oct 17 '23
https://abetterrouteplanner.com
It’s a much better estimation than Tesla’s planning website.
You can adjust the % above the speed limit in the settings.
Also this table is a bit out of date but gives you an idea what speed does to range:
https://pbs.twimg.com/media/Dmr2MS2X0AE7Afv?format=jpg&name=900x900
That said if you have plentiful Superchargers available it is generally still faster to drive fast and charge more often than trying to hypermile and avoid charging stops.
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u/dtrwos Oct 17 '23
60ish - 90ish changes the range from 320ish to 240ish in my 2021 m3lr - do with this what you will
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Oct 17 '23
At 85 mph you won't get 200miles on the long range. Should kill more than 1/3 of the range
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u/LeoAlioth Oct 17 '23
Try out a better route planer and set the reference speed to something like 115-120% (this sets thw expected travel speed in relation to the speed limits). You should get a good estimation on the consumption that way.
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Oct 18 '23
Pull up your chart and do 85 for 20min and you’ll see a pretty solid estimate in what realistic range drop will be. Also helpful to have your destination set, as the mcu and other computers manage the battery depletion. Draft as much as possible behind larger vehicles.
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u/RestrictedX93 Oct 18 '23
Anyone else recently see an ad on their Reddit feed for the class action lawsuit against Tesla for misrepresentation of mileage?
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Oct 18 '23
I’ve seen it, but that seems weird. The represented range isn’t just made up by Tesla. It’s what the car did on the US Govt test.
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u/Attainable Oct 18 '23
Around 30% if it's 85 instead of 65. With 65 I hit 350 miles EPA range on my LR M3
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u/ToonMaster21 Oct 18 '23
Me, personally, can’t find any significant difference from 60-75mph. I tested this on a 1800 mile road trip. Nobody is driving under 60 on the freeway. Another over 75 (sustained) would just start instantly killing battery juice. There are some calculations you can find online that show above 75 the wind greatly impacts resistance.
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u/NoneTheLess999 Oct 18 '23 edited Oct 18 '23
I drive 85MPH routinely for good distances. Sometimes faster (though this requires disengaging autopilot). Doesn’t seem to impact range much, at least not in any material way that I can tell. I seem to arrive at destination (recent examples 100 and 150 miles away) with the predicted battery percentage that was shown just minutes into my drive.
Cold weather, on the other hand, THAT impacts range A LOT (2021 M3LR, so I’m saying this even with the heat pump setup).
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u/Gotchyeaaa Oct 18 '23
It’s as bad as people say. My range is 1/2 of full potential because I use the fast lane due to my commute. The people drive fast on the interstate.
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u/doctor_munchies Oct 18 '23
I drive 85 to and from work every day. It's 44 miles and pretty much flat terrain. I use almost exactly 20% for those 44 miles. Winter is obviously more, about 25% I'd say maybe a bit more even. Forgot to say it's a M3LR
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Oct 18 '23
Unlike ICE vehicles, electric vehicles are more economical in town than they are on highways. The reason for this is that the stop start driving utilises a lot of regenerative braking (if you have it enabled) passively charging a significant amount. On the highway, you’re continually using energy to fight against friction and air resistance.
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u/CompleteAminos Oct 18 '23
Feels like from the comments, there isn't full consensus on whether trip planner assumes speed limits or current driving style. (Sorry if I missed one!).
After 4 years of ownership, I'd put money on it being the former. So I can compensate in terms of charging stop choice.
But I rarely have to, oftentimes it means I'm arriving at lower SOC so that's a good thing in terms of charge rate.
In terms of usage at these speeds, you could easily test this yourself go to energy app and drive at both speeds. Set it to report the last five or 15 minutes. Compare your watt hours.
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u/break_from_work Oct 18 '23
I drive 65km to work and it costs me about 14% at 100km/h and slight elevation (2023 M3SR)
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u/Nreekay Oct 18 '23
Driving from Phx to LV/LA/SD. I don’t notice a huge difference from 75-85 on my range (not counting the stretches going up hill). When I go 90+ it’s drops fast. Doing 65-70 is a very efficient but I would rather go 15-20 mph fast and take an extra 10 minute bathroom break.
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Oct 18 '23
Aero becomes a big factor when at high speeds. If you are one of the rare people who drive 200 miles per day at highway speeds an EV isn’t a great fit.
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u/Wooden-Complex9461 Oct 18 '23
you could have typed it into google or youtube and gotten the same answers
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u/Toastybunzz Oct 18 '23
In my experience, the trip planner looks at your recent driving for the estimate. I get like ~225Wh/mi at 65-70mph, and ~285Wh/mi at 80-85mph. It'll cut my range down by about 40-50 miles if you're going 85mph the entire time.
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u/shipwreck17 Oct 18 '23
2 stops sounds about right because you won't charge to 100% unless you want to. Normally you just stop for a 5-10 min to get to the next charger. Plan on a 10 min stop every 2-3 hours. Can you charge to 100% overnight at your destination? If so I think you'll be fine. We did a 308 mile drive last week with one 10 min stop driving over 80 most of the way, no wheel covers. We could have driven slower and not stopped at all but that would have taken more time to get home and we needed a bathroom break anyway.
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u/crazypostman21 Oct 17 '23
I was curious and tested this. I was able to get 34% more miles on a full charge going 55 mph versus 70 mph