Colorado_Mustang

Average 24-25. Stock 5-speedexcept for air intake and catback.

trance565

i average about 17-18 mixed city/free way with most boltons and 4.10 gears.

BADSEED

my car completely stock i got 170mile on 11 gallons,15.5MPG highway and alot of first and second gear burnouts and was always on it

cliffyk

22 to 24 MPG with a 100 mile round trip daily commute--basically stock except for UPR X-pipe and Flowmaster 40s. This is mostly on I-95 'tween Saint Augustine and Daytona (with a 15 mile sprint each way down US1, at 65 to 70); 75 to 80 MPH with 90-100 bursts on I-95 to get around semis, etc.[/align][/align]I also don't generally waste time coming off stop signs and lights.Surprisingly, this isonly about1.5 MPG less than my s/c'd '92 Miata driven over the same roads, in the same manner.[/align][/align][/align][/align]

Chopper

I can get as much as 32 mpg driving a two lane road that's mosly level at 55 mph.This is driving for mileage.
I checked gas mileage for every bolt-on as it was installed and the results are....
UDP's +1 mpg
Full Bassanni exhaust. No change.
High flow air filter,trim silencer and remove MAF screen +1 mpg
Steeda timing adjuster + 2 mpg
75.mm T/B and elbow No change
This is with stock gears in an 04 GT,manual trans.

sprostang

That is bothcity/highway per tank of gaswith the 4.10`s.

mvr

i get about 20mpg, mixed town and rural... some highway. depends on how much you get on it

mikev08826

12 around town if I'm lucky. Seems to be a lot higher on the highway at a cool 70 mph, but I haven't figured it yet. 20+ maybe??? IDK

kylebgt

Just checked my gas mileage. Ran half a tank through and I am getting 20mpg with mixed city/highway. Not too shaby.

kylebgt

Also since it is winter I have been letting it warm up before driving it anywhere. So in the summer I bet I will be getting around 22-23 mixed city/highway