I know when I first bought my Silverado, the listed MPG was 21 Highway and 18 City. I know this is not an actual representation of the true mileage since my average MPG's for the last 6 years have been 14 to 15 MPG's...

After the Intake system, muffler and Diablo Predator 87 Octane tune, I have raised my MPG's back up to 16 to 17 MPG's.. I actually drove 370 miles on one tank.. Probably could have gotten more if I actually drove the speed limit, also I noticed that I kinda punch it off the line ever since I put in my Intake System

What is your Average MPG's???

 

14 in the city, about the same as when i got it, but i drive hella faster, so i guess its better

 

19 on the highway.

 

I got 19 on the highway the last time I took it for a long drive. And it's still a stock truck (it was before I descreened MAF)

 

Same here 19 on highway and thats with a ton of hills. I have a 180 degree thermostat. Do you guys think that will help or harm my mpg. I know that in the winter it prob will.

 

...I mean I have it purchased but not installed yet.
[align=left] [/align]

 

i get about 21 cruising at 70

 

chevy112488, what did it do to your performace (the 180 thermostat) ?

 

Also thats is 19 with a 4 wheels drive running about 80.

 

i couldnt really tell too much of a difference in performance, but throttle response got better