Quote Originally Posted by Jim Becker View Post
The additional detergents that are often in "premium" fuel might offer some benefit, especially for someone running hard, but otherwise...the only benefit to buying the "premium" fuel is to the vendor's profits.
Premium fuel doesn't have any more detergents than regular or midgrade. Decades ago oil companies attempted to cash in on premium gasoline by putting better detergents into it compared to regular and midgrade. The EPA soon intervened and banned that practice. While additives packages, which include detergents, do vary between gasoline brands, there is a minimum required by law to maintain engines.