I am on my third fillup, 1st tank was 48 mpg, put the right size tires , and aired them up to 44 psi, 2nd tank 51.3 mpg. built a partial upper grill block, aired tires to 50 psi. 3rd tank 57.3 mpg. I keep the speed down to 55mph and under, try to keep rpm @2000, and eoc when ever I can. was hoping to hit 55 mpg, but now my goal is 60 mpg
