Rotating among major brands of premium gasoline will keep one's engine carbon-free. It must be premium, though, as not all majors put the special blend in the bottom end gas.
Got this info off a web site hosted by an oil company engineer, who did this with his pride & joy Corvette. As I recall, he would change brands about every 5000 miles among 3 major companies.
Sal, here in AZ one can get this good gas at a QT station in all their grades. Exxon-Mobile, Shell and Chevron use it in their premiums, though Chevron may now have it in all their grades, too.
TIP: A way to tell if the gasoline company is selling this newest type of gas is to check their advertising. If they are bragging that their gas meets the new automobile company recommendations, then that's it.
