Frank -
Quote:
Originally Posted by Frank Lee
The best time to fill is when it has 1/4 tank or less. Your calculation isn't taking into account all the extra screwing around at gas stations for small fills.
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This is what I do. I fill from 1/4 to 3/4, which is what I used to do prior to being an MPG junkie. I *know* from experience that this is about 5.5 gallons for my gas tank. I never state my single tank fill-ups when talking about MPG. I only go by my 90-day average, which is based on GPS-corrected odometer readings and what the gas station reports in gallons. I am susceptible to pump-error, but I think it evens out over 90 days. The drawback to this is that I can't prove "the little mods" based on my system,
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CarloSW2