Fuel economy after a lift and bigger tires?

[gt1009]

I'm putting a four inch lift and deciding what size tires to put on the truck. Probably gonna be BFG A/Ts unless someone here can reccomend something cheaper for the same quality. Anyways, I was wondering what economy you guys get after a lift and bigger tires. I'm looking to get 35s. I have the 6.2 right now, so I get about 20 mpg around town and am hoping for it to be 17 or better after the lift. What kind of drops do you guys see?

 

[nocoasthardcore]

After going to 35s I dropped from 13 to 9mpg. But, driving fifty nets me 15mpg. Depends on if getting where you're going a few minutes later really bothers you that much.
Lowering your gears to match the increase in tire will help. But you still have extra weight and resistance to contend with.

 

[NV_K5]

What vehicle are you planning on lifting? I have a 1972 K5 that went from 12-14 with 35's and a 2" lift to about 7-8 MPG with an 8" lift and 38's. I also have a 2003 Silverado that with 6000 miles stock 18-20 Mpg to a 6" lift and 315's dropped to 14Mpg at best. (pulling a trailer it drops to ~9 Mpg).

 

[REDCRO_REDNECK]

1987 v10 350/700 3.42s 31" at tires =13.5 (15 pure highway)

towing 12

same truck 4.10 285/7516s mt= 12

towing with gears and tires 11
after

 

[Cornfield creations]

79 K-5 350/350/203-12bolt-10bolt 3:08, 4" lift and 33's 8-10 in town 10-11 highway