Gentlemen,<br /><br />Thanks to the guidance I received on this forum with my previous questions, my motor is running GREAT! I'd like to keep it that way.<br /><br />I'm putting in 89 Octance fuel (that's all the three marinas near my harbor have) and genuine Evinrude Johnson TCW III oil. What additives do I need to put in the fuel? Is there some schedule on which I should put additives to prevent carbon build-up?<br /><br />The boat is a 1994 Boston Whaler Outrage 24, and it has a 196 gallon fuel tank. I usually run the boat with a half a tank or less.<br /><br />Thanks again!<br />Paul 