Here is a two part question:
1) Are "complete fuel system cleaners" worth while?
2) Between stp, gumout regane, valvoline maxlife, valvoline synpower,and prestone- is there really much of a difference in performance? According to some of the MSDS they have slightly different compositions. Do thoes difference make one better than the other?
1) Are "complete fuel system cleaners" worth while?
2) Between stp, gumout regane, valvoline maxlife, valvoline synpower,and prestone- is there really much of a difference in performance? According to some of the MSDS they have slightly different compositions. Do thoes difference make one better than the other?