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Originally Posted by KBerryhill
Well, on the assumption that that is correct, I edited all my tanks to use the computer's calculation for mpg (we've been writing that down, along with the odometer reading, on all the receipts). Went from 27.8 average to 29.1!! Is this real, though? If I take the number of miles on the odometer, and divide by the number of gallons of gas we've purchased, it comes out to around 28 still. This isn't making sense again.
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I don't think it's real. Your using the same odometer reading as the car's computer. The only variable is how much gas is used. If it had to do with gas tank variation some would be higher and some would be lower. I'd edit back to 27.8.
Now if your odometer is inaccurate it could be even less.
My odometer appears to be off by 2% my mpg should really be 26.7 not 27.2.
