Many months ago, through another bike web site, I found a link to an article about gasoline, written by an engineer who worked at a major oil company.
Into his older, pet Corvette, he put 3 different major brands of gasoline on a rotating basis. The reason for this is that some (and only some) oil companies put in, the new, car manufacturer-recommended, special detergent. (As I recall, he switched at around 5000 mile intervals, as that was easy for him to remember.)
Each oil company's formula for the cleaning agent is different, and each one does its own special job of cleaning. To get the optimum benefit, this guy switched around.
Chevron has it; Exxon-Mobil does too; and so does GT.
Some of the big oil companies only put it in their highest octane brew - 91 or 93 (RON+MON/2), but GT puts it in all their octanes. [OK, we all know that there are only 2 octane gasolines brewed, and the middle octane is a 50-50 mix of the low and high gas.]
