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I'd never force-fill the tank, but aside from that, that's the same way I get my mpg. Some tanks don't need to force-fill. The pressure builds up the same in

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Old 02-17-2009, 11:48 PM   #14 (permalink)
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I'd never force-fill the tank, but aside from that, that's the same way I get my mpg. Some tanks don't need to force-fill. The pressure builds up the same in the tank assuming A) You're on a level ground and B) It's the same temperature outside. But the changes aren't enough to throw the mileage off enough to be seriously noticeable.

The pumps stop when a certain pressure has been reached in the tank. If it's off from pump to pump, it won't be more than 1/10th of a gallon which isn't enough to throw off the calculations that much. It's reasonable to say that your MPG is +/- 0.2 MPG.

Also, you should never top off your tank:
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