32+ on the highway, averaging 28 combined on my 55 mile roundtrip for work in DC area traffic. GMPP kit, and I put my foot in it, with shifts around 3500 ( 5000 when I'm into it ).

 

That's about what I am seeing.

 

I'm getting an average of 25ish mph. That's 60-70 miles daily in my commute and I keep it at no less than 75-80 on the highway. You can see all the mods I have in my sig, but I do have a heavy right foot though!!

Later
Allex

 

30 is about the best I have done; less than I expected. The result of my usual combination of mostly hwy with maybe 10/20% around town on business trips.

Maybe if I focused on mpg, hwy would be better; I don't know for sure.

About 24 around town though, which is better than I expected. (5 speed, LSD, Stage 1)

 

i have NEVER gotten over 29 mph on the highway with my 07 LT2 ... 2.4

 

I see 23-24 in summer around town and that is not resetting the MPG at each fill up. That is a real for the month reading.

Highway I see around 30 MPG.

Note the Turbo upgrade will increase the MPG by one MPG under normal driving. IT has been confirmed by an engineer from GMPD.

 

i get 23 city,30 highway.2010 ss with 3100 miles on my car right now.keeps getting better.

 

What upgrade is that?

 

turbo upgrade is called the gms1 or gmpp upgrade. I have gotten an average of just over 30mpg on my last 2 tanks since I've been keeping my foot out of it more lately. granted I hit 138 on the last tank of gas and just over 100 a couple times but nicely driving otherwise. the worst I've ever gotten out of a full tank is just under 25mpg but that was with a lot of over 100mph runs while working on my tune some. been too busy to mess with it lately.

 

Got 33 mpg on my trip back from Omaha to Superior WI last week and that was 87 octane running 74 mph with my Trifecta Tuned 2.4 Auto.