Does any body have real MPG numbers for how a 6" lift affects gas milage. I know the tires affect some what, but trying to figure the lift hit with 33" tires. Just Sold my 8.1 with 6" lift and 295/75R16's my mpg was horrible, Trying to decide between 285/70R17 no lift and 295/75/R16 with lift "almost same size" but don't want to affect mpg to much. - Thanks

why would a lift affect your gas mileage? other than a slight increase in weight, it shouldnt. the tires are the thing that changes your mileage. for one, the bigger and heavier they are, the more it takes to get em turning. also, the taller they are, unless you change your gears it takes more to turn em.


if you have 2 trucks, one stock height and one lifted and everything else is identical including wheels and tires, there is no reason they shouldnt get the same mileage.


unfortunately, with an 8.1 your mileage will suck regardless http://www.dieselplace.com/forum/smileys/smiley18.gifEdited by: haneym

nah, I don't think so. The ground affects of a truck pay a major role in gas milage. The underside of a truck is non arodynamic and the higher it comes off the ground the more drag you are going to have. Fiction, drag and wide resitance are alway big players in gas milage.

You might want to read over your posts before you press enter http://www.dieselplace.com/forum/smileys/smiley9.gif

But as far as the lifts go, I also feel the major reason for losing fuel mileage is the larger tires. They reduce your effective gearing and also weigh a ton more than your old ones will. Both of which will hurt you in trying to get rolling. Also the bigger tires will cause more airdrag because they'll be wider and more exposed to cause more air drag if you lift the truck real high.