WWW You seem to be on top of it all!!! A knowledgeable person as yourself must have "been there, did that" Do you use injection cleaner? What type of oil do you use in your equipment? Whichever is cheapest? Tell us the problems you've experienced with MMO, Rislone or any additives for that matter. I've used it to remove moisture in fuel? (Alcohol works too) I have used MMO for cleaning fuel injectors in small horsepower gas and diesel engines for years. We even use it from time to time for fuel additive on our 3500 horsepower Mercedes diesels on the riverboat i work on for cleaning injectors and stabilizing fuel in the winter. NEVER any problems after the use, numerous problems before. I've winterized all my equipment (including my outboards) with it for over 20 years, seems to work well. I have soaked engines and parts that were seized and something sure loosened them. hmmm... wonder what? Please tell us why we are so stupid for using these products!!