Ive got an edge comp box on my truck the 5x5 and im wondering what level is best to get good fuel mileage on the highway? what level should i set my boost? how much boost is too much? does boost affect fuel mileage?

 

My buddy is running my comp on his truck (My tranny wont hold the comp & smarty stack) and he runs 2x3 and get 22-23mpg all the time, towing and in town. But, that is also with Smarty on 8 and RV275 injectors, plus the intake/exhaust. From reading on this site, i have seen that 30-35psi is max for the stock HY35 (if you have an automatic)

On a side note, if you are running a stock auto, watch that you arent slipping it all the time with the comp on 5x5, it is a wicked box and has no safety shut off/defueling