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Old 07-23-2008, 04:39 PM
MMooney MMooney is offline
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Real Name: Mark E. Mooney
Hybrids: 2006 Ford Escape
Posts: 127
Default Re: Confused about 'life time' mpg display

Quote:
Originally Posted by Benton View Post
You're thinking it's remembering FE second-by-second or foot-by-foot and averaging 'em? I'd have assumed it was just tracking total miles (since reset) and total fuel (since reset) and dividing 'em... two numbers each bumped up each time the car decides it's burned another 1/100th gal of gas or rolled a couple more feet. OTOH, if it really does switch to a rolling average at some point I guess it is tracking FE in some units.

I'll stick by what I said, tho', recalculated--for the OP's FE to jump up from 26.9 to 30.3, the data packets that
fell off the calc had him burning 25 gallons of gas w/o going anywhere.

Benton 23jul08
The consensus for the ave on the FEH is 2000 data points, one every minute, so 33 1/2 half hours of 'running time'.

I agree with you, unless there was an accidental re-set, unseen by the driver, the average numbers are wildly skewed. If there had been a re set, and there were only, say 20 data points, it doesn't take much to cause a big swing.

MM
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