i noticed that after putting octane booster in my tank and then taking the hose from the intake mani to the fuel regulator, my gas mileage definately improved. i make 2 trips a week to this place thats probably 70-90 miles round trip, and has a couple of really nasty uphill grades. usually it would take me just more than a quarter tank
but if i try not to drop a gear while going up the grades and put it in neutral and coast down the other side, it takes me less than a quarter tank round trip.
i might even think about cleaning my air filter someday. it needs it h: