I used to use Amoco unleaded when it was the only unleaded in town. Never had to do anything, the car just ran and the plugs burned clean. Years ago when I had both a 66 Toro and a Audi, both with 10:1 or so, I'd use the Amoco or high end Sunoco. Today i fill up (regular, not having a 10:1 engine) with unleaded - its all we got- and the car just runs and runs and the plugs burn clean. No matter which of my cars I use old or new. Additives? Sure I'll use em soons the oil companys fire their chemists and lower the price 10 c. per gallon so I can become my own chemist. Additives? I'll just use the money to buy more gas. Lars |