OK, so this past weekend, after installing the 285's on my 2002 Z71 4x4 I ran the truck up to Reno and back (round trip 199 miles) and ended up putting 10.7 gallons in it when I got back to top it off. That averages out to 18.59 mpg. The drive to Reno has a lot more hills and turns and braking than the drive to LA, (before I put on the bigger tires I ran an average of 18.6 mpg to LA) so i'm figuring that I may have actually improved my mpg by putting these larger tires on. Also, and many of you may think I'm way off here but I SWEAR to this, my truck handles BETTER after turning up the torsion bars. It take the mtn roads better and my power band also changed. Where I was lagging and my truck was up and down shifting randomly at around 60 to 65 mph (around 2000 rpm), it now runs at 72 mph at 2000 rpm and when I step on it it seems to downshift faster and pull better. Can putting larger tires on and cranking up the torsion bars really do ALL that at once? It feels like a different truck...a BETTER truck.