Mileage trends with amount remaining in tank
Mileage decreases with bigger fuel-up quantity?
Help me figure this out. if I fill up at about half a tank or 1/4 tank remaining, it seems I get closer to 32-33 mpg. If I wait until the tank is 1/8 or less before filling up, I appear to get 29-30mpg. All this with a 2005 Chevy Malibu classic. I can't figure it out. My driving habits are not different. Any thoughts? I even top it off the same way every time.
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