Vyceron

Thanks for the replies everyone. I'm just gonna focus on smiles per gallon

AMWill

That's definitely the best way to do it man!

Let me know if you ever need anything.

-Will

Machfive916

The only mod I have on my 2011 GT (6 speed with .373 gears) is an Airaid CAI. I get an average of 12.2 MPG but almost all of my driving is on city streets. I recently did a 125 mile highway trip and used the cruise control and kept speeds to 70 MPH. This netted 22 MPG on the highway.

bstang14

2014 GT with 3.90's and getting 15-16 city. I do not baby it on take off, typically shifting 1-2 and 2-3 @3.5 -4k. Love the way it pulls and sounds with the Corsa's. These motors really like higher rpms.

Dino Dino Bambino

You mean smiles per mile.

ticopowell

My 14GT gets about 18-20 in the city and I have seen 27 on the highway a few times with an average of 24-25 on the highway. But I do have the 3.31 gears