Trip Computer Avg Mpg

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sardillim
Posts: 99
Joined: Thu Apr 24, 2014 3:45 am
Location: Easton Ct

Trip Computer Avg Mpg

Post by sardillim » Sun Jun 17, 2018 2:19 am

For about the last 6 months i have noticed the avg MPG drop from about 19.5 to 16.5. what was strange is that the drop happened suddenly and it didn't seem like the range per tank of gas had changed. So the last two fill ups i checked the mileage the old fashion way by dividing the miles by the amount of gallons and i found the car is really getting 21.5 - 22.0 mpg not the 16.5 as the trip computer states. So my question is how dose the trip computer calculate the MPG ? Is there some sort of a fuel flow meter ? is there anyway to calibrate this???

CrashTestDummy
Posts: 1723
Joined: Sat Feb 07, 2015 8:31 pm
Location: Pearland, Texas

Re: Trip Computer Avg Mpg

Post by CrashTestDummy » Sun Jun 17, 2018 3:44 am

That would be nice to know. My wife’s Tahoe has gone from ~18 MPG when we bought it to about 13 now. It runs fine, and we use the usual premium fuel from the same station all the time. Trying to figure out what’s the deal.
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
Do YOU have my SPID?

s/c'd cav
Posts: 505
Joined: Mon May 30, 2016 8:12 am
Location: PHOENIX AZ

Re: Trip Computer Avg Mpg

Post by s/c'd cav » Tue Jun 19, 2018 6:22 am

you can do nothing to the factory trip function

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