I am hoping you guys can help me out. What setting are you getting the best fuel mileage out of the smarty on. I normally run on 5 all the time, but am getting ready to go on a long trip not towing so i thought i would just go for better economy if possible. With my setup what do you recomend running it on. Thanks, Ross

 

Every truck seems to respond just a little differently so it is hard to exactly answer your question.

For me, aftermarket turbo/stock injectors, mod TM, sw7 (with a light right foot too!) gives best mileage-- especially when towing. If you don't have a modded tranny though, I would stay with sw5 or below and mild TM.