But your comment assumes there IS a drop off in performance and therefore, the injectors need cleaning. I would wager that the vast majority of cars NEVER need injector cleaning. I have been driving fuel injected cars since 1986. Never in all that time and including the wife's and kids cars, have I had an injector cleaned. Nor have I noticed this "drop off in performance" you speak of. It's all BS, they basically don't go bad and if they do, you'll get a check engine light. The $200 spent on a can og BG was a total waste....total.