Mine is a non turbo and w/ a 32/36 Weber, with 31's and I get about 200miles per tank 15.9 gal tank. Thats apprx 12.5 mpg. By the way, That is from red light to red light wide open to idle wide open to idle. I am not kind to my motor, I run premium gas, Mobil 1 oil and pure 1 filters. I pound this truck <img src="/forums/images/graemlins/evil.gif" alt="" /> <img src="/forums/images/graemlins/evil.gif" alt="" /> <img src="/forums/images/graemlins/evil.gif" alt="" /> and I give it what it needs to take it... And I get 12.5mpg with factory steel wheels. I think steel or aluminum will not change anything for you, You put on the 35"s, U play, U pay.

I am coservitive off road though <img src="/forums/images/graemlins/baby.gif" alt="" /> <img src="/forums/images/graemlins/shiner.gif" alt="" />