I recently got a fuel additive called syntek Xtreme fuel treatment.. i learned of it on here and have had wonderful success…. My car gained a extra 4 mpg and im saving about $150 in gas a month ( its helped me get dish television and a new cell phone) how come no one has heard of it and im wondering if it will help my boat out as much as my car .. the fuel is different and the engines are different .. anyone tried this out yet?????????