[JPST]

I'm looking into tuning my FiST. The Cobb system seems to be well liked and effective. My question for the guys out there that have done this; How has this impacted your MPG? I'm curious because I drive a lot.

 

[aar0n]

I drive to work 25 miles one way and i just flashed the stage 2 tune. So far its like .5 mpg difference. I dont have an intercooler installed yet but I do have a catless dp installed. The difference is negligible since I have been doing WOT pulls alot just messing around and data logging. If I drove normal it would probably around the same. This is just my experience in michigan.

 

[localbacon]

I drive 20 miles to and from work, with the highway/city being a 80/20 split. Staying out of boost with either a light foot with OTS Stage 3 tune or the 'ECON' OTS tune, I can get an indicated 35 MPG all day long. Boosting alot will bring my tank average to 31mpg. I haven't noticed a MPG difference from stock to stage 3 UNLESS I get on it. I have Injen intake, catless 2JR DP to Cobb C(less)BE and Levels FMIC.

 

[crzyworm623]

I'm running full stage two all Cobb parts and my commute is 50/50 highway, 22 miles each way. I average 29.5 on screen.

It's hard to compare before, because before the parts I babied the car a bit more as it was under 5000 miles and it was also warmer weather. I saw 30-31 mpg.

I'm sure if i went back to that style driving, mpg would be the same.

Always 93 octane.

 

[JPST]

Thanks for the feedback guys. I'll defiantly be tuning mine then. I couldn't find any info on MPG and I was scared that it would plummet.

 

[Mr UFO]

Cobb stage 2
Mountune intake and front mount.
Just logged 23.8 at the pump all city driving. That was mostly with a light foot too!
Driving 350 hwy miles this week. Will report back-

 

[Mr UFO]

Cobb stage 2
Mountune intake and front mount.
Just logged 23.8 at the pump all city driving. That was mostly with a light foot too!
Driving 350 hwy miles this week. Will report back-

27 mpg highway on stage 2 with above mods. Speeds were 70-75mph.
Much lower than I expected.

 

[eqc.liu]

Stage 1 and I'm around 26 mpg local. I took a 150 mile road trip which brought my average over 28 but it has since gone back down .

 

[Pathros Aquino]

Stage 3

city driving only. 26-27 mpg

 

[WestcoastST]

I drive 70 miles per day, my average speed is listed at 45 mph, and 26-27 mpg. I have a stage 3 tune. Sometimes I run the psuedotune going home from work, but then switch to stage 3 tune at the off ramp. I usually drive it like I stole it though, especially on the street on the way home. 80 mph on the freeway at 3:30 am going to work, and 60 mph average on the way home.
We're working on an e40 tune. I expect my MPG to drop at least to 23 MPG.

 

[Mr UFO]

Cobb stage 2 tune: city 23 hwy 33 - driving like a granny!
I was running the old stage 2 tune which got worse gas mileage but midrange power felt stronger.