Getting Bad Gas Mileage, Truck Seems To Run Great
It's mostly just premium around here. Marine and Aviation gas are generally higher octane but aren't really designed for automotive use. Racing fuel can be used in a car or truck but it's so expensive you're better off just using regular gasoline. Aviation gas can burn holes in pistons since it's designed for steady running not speeding up and down as well as the tax evasion risk you run since there are no road taxes paid on it.
Sheeshhhhhh tax evasion
I just filled up at Sunoco today. My lastest average gas mileage was 10.6 MPG... not sure if it is a placebo affect but I think I can already feel a difference in my truck after filling up at Sunoco.










