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Old 07-23-2008, 01:29 PM
Benton Benton is offline
Active Enthusiast
 
Real Name: Benton
Location: Portland, OR
Hybrids: Lexus RX400h
Posts: 56
Default Re: Confused about 'life time' mpg display

Quote:
Originally Posted by MMooney View Post
I can't prove this, but my other hybrid only holds a finite number of data points in it
s um, lifetime fuel average. If one never re-sets they get a moving average mpg reading that is based on this finite number of data points.

I'd be surprised if the higlander is set up to hold tens of thousands of miles of data.
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

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MPG is rising with engine break-in and warmer weather
Hybrid Cars Mileage
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