Boosted MPG?

[sully]

my 408ci with tvs2300 gets 13-14 if I don't get into it and 6-8 if I do. Built tranny with 3k stall, forged motor running about 17psi.

 

[ATL]

thats about what my stock denali gets

 

[sully]

damn, I was getting 16-17 all stock driving conservatively.

 

[Denali0229]

I get 10-11 in my Denali but I do mostly stop and go driving. I got 17 when I did mainly highway on one tank. GM definitely way over estimates mpg. I always start very slow at stops too.