35s with 4.56 gears and supercharged i get around 13 mpg on highway.

 

i put 4.56 in my 2007 V6 and 305/65/18 bfg's. went from 12 with stock 3.55 to 17/18 with 4.56

 

What is yall's average speed calulating these figures?

Going the speed limit, 65-70mph, but truck with 30" tires and 4.11 gears got 20mpg this weekend going 65-70mph. Not bad for a 450rwhp truck with gears IMO.

I know it's hard to let people zoom by you, but going 5-10 miles over the speed limit only gets you there a few minutes faster..

 

$3.90 a gal. would make me