i was wondering what kind of mileage a i would be getting if i added 5 more inches to the already 6 inches of lift i already have. i would also be putting 4.88 gears with 38-15.5-17. and also adding true duals. i currentyl have a gryphon programmer cold air intake flow master exhaust. im running 35-12.5-17 and i can get close to 18 mpg on highway.

 

Do you have stock gears now? Truck looks good as is if u ask me. What tires are u looking at for the 38s. If u are going with that big of tires how concerned are u really with mileage? just saying, u would probably leave good enough alone and stick with the 35s if u were super concerned.

 

With 37s and 10" of lift with 4.88s I can get 12.5. My best since lifted is 14 around town

 

I have 38x15.50s and 4.88s in my 4.6 and I get 11.5 about 50% highway and 50% city. I managed to get 13 on the pure highway.

 

I run 37x13.50x17's with 4.88's and I get 13 in town, and a tiny bit better on the highway, sometimes as high as 15, depending on the headwind.

And, like jerrybizzle points out, if your running a big rig, gas mileage is not nearly as important as looking cool

 

gosh sled, I love your truck!

 

Just averaged 13.1 on my last tank and oh I've got the 5.4 and for hwy I've seen up around 15

 

haha yeah im not to concerned about mileage. i was really just wondering. thanks guys. im on the edge of doing more to my truck or just leaving it. im gradutating in a year so i will most likely be getting an f250