i have 4.10's and with the Cruise Control on at 70 mph, i can get to my parents house in Maine (284 miles, 282 of it is highway) on a half a tank......so i get like 15-16 highway with my 95 360, with 204K........but then again, ive replaced almost everything in my truck since ive had it


but be glad with 13.5.....think about it, without the lift and tires you probably would get 15-16.....at least you dont get a consistant 8-10 mpg's

 

when i first bought my truck i had to drive 100 miles home. only used an 1/8 tank. i have a 26 gallon tank. i dont really know what i was getting for mileage, but id say it was pretty good.