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Old 05-02-2009, 12:30 PM   #81 (permalink)
PA Prius
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Join Date: Mar 2009
Location: SE PA
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Quote:
Originally Posted by Matt Herring View Post
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.
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

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