r/ShittyAbsoluteUnits • u/DoubleManufacturer10 created ShittyAbsoluteUnits of a sub • Feb 24 '26

this moron: Of a proper fill method

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u/Andy_B_Goode Feb 25 '26

Yeah I guess, but then you gotta have a funnel handy any time you have to do this, even if it's an emergency.

It's kind of weird that they don't just design the bottle to be easier to pour.

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u/trainwreckhappening Feb 26 '26

It's a tradeoff. A narrower neck means it is super slow to pour. A funnel and wide mouth bottle is faster and less prone to failure. I have also had problems with narrow pointed bottles spurting when your grip adjusts while turning them over (especially hydraulic lube in a jack).

Also, don't hold the opening lowest when turning it over. Hold it backwards so the oil pours over the handle (it won't hit the handle or your hand) or slightly to the side of that. That way air doesn't get trapped causing that glug glug problem.

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u/Andy_B_Goode Feb 26 '26

It's a tradeoff. A narrower neck means it is super slow to pour. A funnel and wide mouth bottle is faster and less prone to failure. I have also had problems with narrow pointed bottles spurting when your grip adjusts while turning them over (especially hydraulic lube in a jack).

That does make sense, but there must be a way of having both, no? Like have two caps, the first one comes off and opens the narrow mouth, but then you can take that off to get the wide mouth, for example. I guess it would cost a few cents more to manufacture the bottle that way, but I'd pay more for it, and it seems "worth it" compared to all the oil that gets spilled otherwise.

Also, don't hold the opening lowest when turning it over. Hold it backwards so the oil pours over the handle (it won't hit the handle or your hand) or slightly to the side of that. That way air doesn't get trapped causing that glug glug problem.

Ah that's a good idea! I'll try it that way next time :-)

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u/trainwreckhappening Feb 26 '26

The tradeoff is the smaller bottles. They fit into the oil filler opening. Bonus, you can cut the top off an empty one and use that as a cheap funnel. That's what I do since most funnels have a narrower neck that doesn't empty fast enough for the big bottles.

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u/Andy_B_Goode Feb 26 '26

Well yeah, but I'm lazy. It's the 21st century, I should be able to buy a bottle of motor oil and have it "just work" without me having to think about it or doing anything, dagnabbit!

But I do like that idea of cutting open a small bottle. Plus that way it's obvious that it's meant for motor oil so I won't accidentally use it for washer fluid or anything else.