| well right now I have the 265's back on it, but with the 285's there really wasn't much difference, maybe 1 or possibly 2 mpg decrease.
I was getting about 14.5 with the 285's now if I REALLY baby it i'll get about 16 or 16.5..
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2006 Silverado Duramax
Ext. Cab Short Bed.
MBRP 4" T/B SS
PPE
Autometer Cobalt boost and Pyro
Hummer wheels with 285/70/17 Nitto Terra Grapplers
Whelen amber strobes on back rack with amber strobes in the grille.
Back Rack
Boss Plow |