I just thought of something, all things being equal (time, speed, miles, etc...), if someone goes from a car that gets 25mpg and can go 500 miles on a tank, to a car that gets 50mpg and can go 1000 miles on a tank, over 100,000 miles, they'll save about 16 hours of time spent in gas stations, assuming a 5 minute fillup. 32 hours assuming a 10 minute fillup!
So if I can double my mileage via mods, or just double my tank size, all in under ~32 hours (I've never had a 5 minute fillup, 10-15 minutes is more like it), then I will be ahead of the game time wise.
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