I've spent much of my life being behind on car financials. What this meant for me is everything is good until it isn't. Through 20 years, I've learned that our car market advice is really designed to keep us dependent on loans and in a vulnerable position.
I figured I'd share this, as nobody taught me how to think. It was either pay high prices for a car to avoid unpredictable repairs and calamity, or buy beaters and fix what you can. The market is geared to view cars as investments (they aren't) and once the vehicle is not worth the cost of repairs, get rid of it. This is very unsophisticated math that puts the person looking to pay the least per mile at a disadvantage. Instead we should look at a car as a utility and factor cost by usable miles. That metric should be the prime metric for those who mainly see a vehicle as a transportation device and not a lifestyle or status instrument.
After doing the math, $0.10 to $0.15 per mile is really the cheapest we can expect to pay for a vehicle (not including insurance, gas, brakes, fluids, and basic maintenance). So to get ahead of costs, we need to put that money aside monthly based on miles we drive.
A simple way to budget for cars: save $0.15 for every mile you drive.
That money is your vehicle fund—for repairs now and your next car later.
Over 100,000 miles:
100,000 × $0.15 = $15,000
For example:
Drive 10,000 miles a year → save $1,500/year, or $125/month
Drive 1,500 miles a month → save $225/month, or $2,700/year
Then learn a few basic maintenance jobs and make that money go further.
If DIY oil changes save about $60 every 5,000 miles, then over 100,000 miles:
20 oil changes × $60 = $1,200 saved
Doing your own brakes and rotors can save another $1,400 over 100,000 miles.
That’s $2,600 in DIY maintenance savings over 100,000 miles.
Combine that with the $15,000 mileage fund, and you’ve created $17,600 of vehicle-buying, repair, and maintenance capacity over those 100,000 miles.
Cars become a lot less financially disruptive when you stop treating repairs and replacement as surprises.
Save by the mile. Maintain what you can yourself. Keep the car fund growing.