Average fuel economy calculation

[Volkster]

Does anyone know how many miles is used to calculate the average fuel economy? It appears to be a fairly short amount as I can drop the average by .5 mpg in just a few miles if I'm hammering on it a lot. My guess is it averages like the last 50 or 100 miles max. Nothing is mentioned in the manual

 

[Bigtone]

Does anyone know how many miles is used to calculate the average fuel economy? It appears to be a fairly short amount as I can drop the average by .5 mpg in just a few miles if I'm hammering on it a lot. My guess is it averages like the last 50 or 100 miles max. Nothing is mentioned in the manual

I believe that it averages from the last time it was reset. Right after you reset, the average changes quickly. With time it takes longer to make any kind of change., because the averaging period is longer. Alot of GM products have a 50 pr 100 mile selectable average.

 

[Volkster]

I believe that it averages from the last time it was reset. Right after you reset, the average changes quickly. With time it takes longer to make any kind of change., because the averaging period is longer. Alot of GM products have a 50 pr 100 mile selectable average.

Yeah but I have 3,500 miles on it without ever resetting it so I doubt it's since the last reset solely

 

[Bigtone]

Yeah but I have 3,500 miles on it without ever resetting it so I doubt it's since the last reset solely

Wow, never went that long without resetting. I do with each fill up, when I remember.

 

[DM-SC]

I reset Trip A each time I fill up but I've never reset Trip B.

The mpg on the fuel milage screen matches the mpg for Trip B.

The fuel milage screen must be displaying mpg calculated since it was last reset. In my case, since the truck was brand new.

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