The Knotty Oar Marina offers ONLY Non-Oxygenated, Non-Ethanol fuel. Why is that? Because we realize our customers take pride in their boats and want to offer nothing less than the best. Yes, we know it’s more expensive. Ethanol is alcohol and will attract/absorb water into gas resulting in phase separation of fuel. Ethanol fuels rapidly absorb 50 times more water, than non-alcohol gas. Boats love water but engines do not! Due to the instability of gas containing alcohol, shelf life is less than 3 months. The sad reality is that ethanol fuels are not safe for most marine engines. So bite the bullet and buy Non-Oxy! Your engine and pocket book will thank you in the end!