98NATA

What grade of gas are you guys running? My bro has always ran 93 in his vho and didnt know what is recommended. And what kind of mileage do you guys average..I'm looking at a 07 crew cab z71 btw? Do you see much of a drop with 20's and 33's from stock 17's? And while Im at it whats a fair price for this truck, its an ltz w/ 30k

sleepersilverado

iTrader: (1)

20's+33's = 15mpg highway and 11mpg city. stock i was getting 18mph highway and 13mpg city.

BLACK04VHO

iTrader: (2)

I run 89 with a tune. I get 12.5 in town and 14-15 on the highway. that's with 18 inch wheels with 35x13.50 tires. I wish I would have gotten some lighter 20's and sae some weight from the tires also.

LawmanSS

iTrader: (19)

I run 87 with the stock tune. I'm hoping to go with a Blackbear tune in the spring...probably will do an 89 octane tune.

Vmax2007

Just do it right and get a 92/93 tune, why f*ck around with an "in-betweener"?

xchevyx24

i run 91 in my truck all the time and i avg 19.7 fwy and around 14 in town i have stock 20"s

LawmanSS

iTrader: (19)

Don't sugar-coat it Jeff...say what you really mean!

Is the difference dramatic between the 89 tune and 92 tune?

LETHL_SS

iTrader: (23)

I have a reallllly agressive tune and have to run 93. I get about 14-15 hwy and 11-12 in town with 20's and 33's.

jimmyboy8301

iTrader: (2)

i was running 87, but now that i have my EFI Live tune i run 93

LARRY01Z28

iTrader: (28)

i average 17.8 city and hwy. never checked them sepratley. mine is an 06 tho.
with 20's.