Any of you guys running 285 BFG's on the OEM wheels... have you had any MPG loss? They weigh in at +4 LBS over stock AT/S's. Figured I'd ask before, with the price those things are going for. Those tires are 2x the OEM price tag. I'm debating running stock tires and getting a Detroit locker for the rear. that way I get supurb traction and don't sacrafise mileage any. Or run the BFG's and keep the stock LSD.