so right now ive got my 2006 1500 qcsb 4x4 with a cold air intake long tube headers high flow cats and a flowmaster turn down, lifted 5.5 inches in the front and 4.5 in the rear running 35 inch tires on stock 3.92 gears, using the superchips 3950 on 91 oct perf tune with superchips shift schedual and torque management getting 15mpg hwy 12 city, trying to determin if i switch it over to the milage tune, or change shift table and torque management will get me better mpg, or will it hurt because of the load the 35's on 3.92 puts on the truck... any help would be appreciated

 

I think that from what people have said you really don't gain any MPG running the mileage tune with a lower octane gas.That running the 91 tune with premium gas also has the best results MPG wise as well.I also have a 06 QC HEMI that i get 16 MPG city 20 highway and i run the 91 tune with 93 octane gas.Thought about changing and trying it for myself just haven't yet. I think the most you can do is just try and take it easy on the throttle(LOL)