easy mpg improvements?

[TimmyG]

My 3 in body lift droped my mpg by 1.5

 

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[GD450]

Try putting in premium fuel. I get about 1-2 MPG more when I use premium fuel (91 octane).

[carrmann]

good to know thank you TimmyG

wow really? thats odd. do you have a tuner or a tune GD450?

[GD450]

Nope, nothing other than what came from the factory.

[JAMIEZ71]

My 1/2 ton has 285/75/16 and 2" lift front and rear and mileage on it is 13-14 no matter highway or not. That is with factory 4.10 gear. When i had stock 265s I could get 13-15 town and 18-19 highway. Big heavy 8 ply tires just kill the little 5.3 period. Even people I know with 3/4 ton gassers get same mileage out of 6.0 whether it's highway or city.

[carrmann]

so I've been reading that disabling the v4 (afm) system actually improves fuel economy? any truth to this?