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great white 10-04-2006, 02:39 PM I just purchased an 02 duramax ext cab shrt bed, 4x4, I'm running 285/75/16 bfgs the truck is all stock (for now), i'm averaging 13-14 driving mostly city, I havn't had a chance to run it for very long on the free way. Does this milage seem normal for an LB7 boondokr 10-04-2006, 03:05 PM Yes, with 285's that seems about right. I get 15-16 city running 265's. emerson 10-04-2006, 03:06 PM I just purchased an 02 duramax ext cab shrt bed, 4x4, I'm running 285/75/16 bfgs the truck is all stock (for now), i'm averaging 13-14 driving mostly city, I havn't had a chance to run it for very long on the free way. Does this milage seem normal for an LB7 Hand calculated? Have you reprogrammed your ecm for the bigger tires? krash610 10-04-2006, 03:47 PM i got 285s and thats sound about right. i'm getting 14.5-15.5. 65%city/35% highway. BullydogPowered 10-04-2006, 08:03 PM i get 16 hand calculated all city everytime with my 285's and mods in sig. tuner set on the highest setting. you must be running the truck hard. MYZ06 10-05-2006, 10:00 PM I'm about 16-17 with Edge and AFE. I need to get my bullydog on to help out some. If the tires are mud tires, that it's a little worse than an all terrain but not much. White Duramax 10-05-2006, 10:15 PM You need to add around 8% to your miles if your speedometer is not corrected, when figuring fuel mileage. | ||