21 MPG in Town???!

[TogaPC]

I'm not sure if this is correct or not because I haven't filled up yet but 3 days ago I reset my Avg MPG on the hoe and have been driving to work and back averaging 21 MPG. How is this possible? I'm driving pretty nice and the speed limit on the road I take to work is 40 MPH. The trip is 8.8 miles one way and there are several stop lights and traffic to deal with so I just don't understand how this can be possible. The gas gauge hasn't hardly moved so I guess it could be right but I've never gotten mileage like this in my life.

Could my Blackbear Tune have messed up my DIC calculations?

 

[KrautBurner]

I'd never trust the dic computer, (I'd use the instant fuel economy as a tool (like a vacuum gauge))

I always figure my milage at each fillup.
go ahead and fillup and see how it compares.

I believe that alot of the time when tuning a vehicle,
the computer dosn't calculate the fuel usage the same. (more air/fuel)

 

[timjohnson22]

Drive around for about a month and let us know if its the same MPG

 

[Nickleahy23]

well i get about half of that around town so idk lol...most people are seeing 16-18 all highway, so 21 all city seems a bit out there

 

[TogaPC]

Kinda got on it a little on the way home from work and my mileage dropped to 20 but on the way back to work this morning it went back up to 20.5. I'll keep monitoring it and when I fill up I'll do a manual calculation.

 

[stayedge]

lol i only get 13-15 city and highway

 

[puckhead]

lol i only get 13-15 city and highway

same here, sucks