Ihave had the old girl sitting up for about a month...drained all the old fuel, replaced with high octane fuel yesterday..and added " cocktail" that i saw on Merc motor site..it burped a few times at startup..after that was all buisness..ran great, 1 oz Marine Stabil..1oz quikleen..1 oz seamfoam..per 6 gals of fuel, seemed to do real well...FYI Only for you guys that may have one sitting..