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Old 09-08-2008, 01:02 PM   #12 (permalink)
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Originally Posted by azraelswrd View Post
I remember reading some posts on CleanMPG that Toyota built-in MPG meters are notorious for being too optimistic (ie higher MPG than it should be). Not sure what would account for these discrepancies but this is why nothing beats the odometer-tank fill method of MPG tracking.
According to the test done in Prius vs. Diesel Jeep Patriot by the auto-magazine 5th Gear, the Toyota Prius' trip computer was a whopping 17.1 mpg too optimistic.

The trip computer on my BMW 325i seems to be spot on based upon my odometer-tank MPG tracking.
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