I was at a boat show recently and had the chance to talk with a gentlemen who is very knowledgeable regarding effects of E10 on marine and non-marine engines. My question to him was why have I not had any bad effects from E10 if I have been running it for a while already? The gentlemen, Tim, had a demonstration to show me how his product takes the water in the fuel and re-suspends it in the gas. It was pretty convincing. Anyway, I am including an email from him that explains it better than I ever can. I like the product. I have a 2003 Yamaha 200 HPDI. I use Yamalube and ring free exclusively. Do your own research and draw your own conclusions. Regards, Cabana Dan Hi Daniel, yes I do remember you, thanks for the email. I get this question often, the fact of the matter is you have been lucky so far. The big issue with ethanol is it is a very unstable fuel when it is shipped from the refinery. It is shipped through several tank farms/distributors and contract delivery trucks. If you continue to get fresh fuel and the trucks are clean you may not have a problem. However we do fuel polishing jobs everyday for people that haven't had problems before. When it hits it is sudden and gets progressively worse very quickly. Fuel demand is down and continues to decrease, fuel storage tanks are bulging with over supply which is the worst scenario for ethanol. It will absorb water from the atmosphere when kept in storage and progresses into a acidic/rancid condition which can present serious problems. Our Gas-shok product is an extremely effective stabilizer, plus it increases MPG 10-20% which more than offsets its cost. Therefore it only makes sense to be proactive rather than reactive, use it as insurance against the possibility of problems. It has been our experience that if you are not using a good stabilizer it is not a question of if you will have problems but when. Our products have been certified as safe for use in all fuel burning engines. They will not affect your warranty or attack hoses, gaskets or seals. We are setting up new dealers in your area. It will be available soon in Sunshine Ace, Naples Marine, Wolcott Marine, and Marina Mikes. we will also ship it to you at your request. Have a great weekend, THX again. Tim