My truck must be the odd one out, because i couldnt get that kind of mileage with stock tires and no chip. With the banks( I know BAD choice) ion 3 or 4, which is 50 + 75 hp approx., I got 12.3 the last two tanks, and a whopping 14.3 the time before that. These number were at 60-70mph on medium length road trips. I only have 305s on and not 35s. HA HA! Maybe thats the prob. My truck SUCKS!

 

The best mileage stock I was ever able to get was 18.2 hand caculated with the lil michi's. The best I have gotten was just a hair over 20 hand caculated but right now with just the TD it stays around 17.5-18 consistently with the 33" Mud grapplers. I want to do everything possible to it for mileage just so I can say I get it but it would be nice to get the range up around 700. I have squeezed 653 miles out of a tank about 2 months ago and had about a gallon in the tank but I dont think i'll do it again.

 

I get around 16-17 miles to the gallon. That's running my Triple Dog on performance mainly town miles and cruising miles. Haven't had a chance to take a road trip yet, maybe this spring.