Well I am wondering how your gas mileage is affected with an aftermarket tune on these cars. I am thinking of getting a tune in the future but drive somewhat a lot of miles to work everyday. I would like to know what people are getting on the highway about 70-75 and in town as well. Thanks in advance for the help.

 

unless you have a very aggressive tune you'll probably get better mileage than stock.

 

mine stayed the same

 

22mpg

 

^^ was that where you were before? I assume mostly city?

 

The heavier the foot the worse the mileage, its as simple as that. Plus more boost = more air which needs more fuel.

 

26 ftw! mahaha lots of freeway cruisin

 

yea mostly

highway i get about 28

and when i first got the car i was like 19 i think because i had a heavy foot
i grown out of that stage so i dont drive fast unless im late for work lol

 

I get about 30

 

Well I'm already getting about 28-30, was wondering if it would go up or down much. My only problem is the on ramps!

 

avg. mixed city and highway, 35. all highway, 46-48

 

^^ and where did you get your tune from? hpt or hahn ppc, or something else?

 

It is the same as before

Stay out of boost and you get good MPG

In the boost, you are going to watch your MPG fall.

 

my friend and i tune ourselves. using efilive. im currently learning the tuning basics. my friend seems to be a genius.

 

Efilive on the lnf?

 

Same for me... no change at all.

 

hmmmmm.......

I get 30-35 highway and 25-28 city when out of the throttle. (tuned by me)

 

better.... 23.8 avg up from 21

 

I do mostly city driving with about a 20 mpg average.

 

Good weather, flat surface, and consistent speeds between 40 and 50mph - I can get upwards of 50+mpg with my tune.

http://s256.photobucket.com/player.s...fs=1&os=1&ap=1

Now that the weather is freakin' freezing and the winter blend fuels have hit the pumps, I've taken up to a 20% hit in fuel mileage (i.e. that 50 is now 40).

Overall, I tend to average ~26 all of the time now. In the summer it was closer to 29 or 30. But, that includes MI highway speeds (~75mph).

 

Thanks for all the help peeps

 

I have been getting over 30 MPG. On a road trip, average speed was 67 MPH, and I averaged 33.7 MPG. I am very pleased with my Cobalt.

 

I get about 28-29 mixed highway/ city!