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7
votes
3answers
4k views

Does pumping gas when the tank is half full and on the low flow setting provide an economic benefit?

There is a chain post making the rounds in my social networks. It asserts that gasoline vapors can affect how much fuel you actually get. To minimize the amount of vapor passed through the ...
12
votes
1answer
517 views

Did banning lead additives in petrol (gasoline) make a large contribution to lowering lead levels in people's blood?

There has been a renewed interest recently in the effects of low doses of lead especially in children (see this question, for example: Is lead exposure responsible for the rise and fall of violent ...
7
votes
0answers
179 views

Does the gasoline of different gasoline brands have any real acknowledgable difference?

A friend of mine said that he could apparently get better mileage using Chevron oil instead of Shell's (and other brands). Is there any substance to this claim?
19
votes
1answer
406 views

Do lower speed limits reduce gasoline usage?

There are three parts to this question: Does speed have an effect on miles-per-gallon? Is there a more accurate causal effect than speed that would also cause a connection at varying speeds? ...