Quote:
Originally Posted by Matt Herring
I've been doing alot of reading about the gas tank "bladder" in the Prius. It seems it is difficult to get 100% accurate fill numbers (especially in the winter) because the bladder shrinks in size due to the environment it is in (cold or hot). I'll keep an eye on this as I compare in-car mpg vs. SGII mpg vs. actual fill mpg.
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Right. Calculating the mileage the manual way after each fill-up is not accurate. I've found the MFD runs consistently 1 mpg high--- calculated by averaging the total miles driven and gallons used after many tanks.
PA Prius