stang5151

I've averaged around 19 with combo driving - around town & freeway. And when I did take a road trip over 400 miles I got 23 for that tank. I run a 93 octane tune from Tillman Speed.

vasman

2mpg is nothing. I was worried for more that why I was asking. Thanks to all for the input, particularly about the gtee about the noise. ! I will report my progress.

dkersten

I went from 26 mpg to 7.5 mpg.. of course I enjoyed the gears so much I have sort of been heavy on the pedal.. :P

VistaGT

I recently did a milage check on my car over an entire tank. I got an average of 23.4mpg. This included mostly highway miles with some local. Most of the highway milage was driven conservatively but some of it was driven aggresively. I do have 4.10s

wingman75

If you want the car to get the top mileage don't do anything to it and drive like a 90 year old (no offense to any 90+s reading this ). Even though a lot of the mods we do tend to help actual mileage the temptation to stomp on it will cancel out any gains. And as others have said, if you have to ask if you can do the gears... you can't without screwing up your car.

owero01

Definitely worth it. I get 24-26 mpg at the 65-70 mph range. A little bigger drop in city mpg. Well worth it though. Will put a wide grin on your face.

Allstar

if you think about it... you might not loose any depending on your driving.

if you do more city driving you may increase your total mpg per tank if you dont really drive on the highway that much

and vice versa

J to the C

I got 22MPG on my 250 mile trip with my auto today. Avg just above 70mph. 87 octane custom tuned.

Rubrignitz

I get 23mpg with 4.10's AND cams highway. It creeps from 7-18mpg city when I reset the computer. You won't get much better highway with the TR3650.

4.10's are soooooo worth it.