2015 cascada 245 wheel base dd15 13 speed
Whats the best mph or rpm to run ? The sweet spot 1375-1450 rpm ? Help ?? 342 rear end gears / dd15 / 13 speed / fleet air filter / pull a van wt 75-80 thousand pounds./ 10-30 fully synthetic Mobil oil / i get 5.22 mpg driving 70 mph / drove 65 mph didn't see much different s in mpg ! have 22.5 Tall tires on . i have 218000 miles on engine. I did the overhead on dd15 at 100,000. I am looking for ideas to get mpg up !
Is this a good question?