betterthanstock said:I just add a quart ( or lately just half a quart) of 30W non-detergent motor oil. It helps actually give a slight improvement in mileage...
klenger said:You'd get even more milage if you add 1 gal of oil. You are adding fuel to the tank.
Wouldn't that be the ultimate warranty buster for D. C. ?, sell the truck before factory authorized fuel is available.