premium
yea, that amoco ultimate looks like it would enhance your truck, no only 89 octane will be fine, to be honest the higher octane actually runs the truck. make sure you don't put diesel in it, like my parents did with a rent a car. Let me tell you, that car will run ver yvery rough. It was a laughing matter. The ford taurus was running so crapy when we returned it to Avis. They didn't know what was going on, and we never got charged for damaging the engine. Just make that a lesson to all of you. never put leaded or diesel, it will totally mess it up. You dont want that big growl that the trucks and the ford excursion make. Although that growl is awesome, it will mess up your truck.