Stabil nor sea Foam will prevent octane loss over time. Fuel loses octane at up to .5 points a month. In 10 months it could lose up to 5 octane points. Add the high octane to get it back up to where it should be. At this point, I would just wait till Spring to add it.

I'd like to hear more discussion on the ethanol and water attraction. Water is heavier and ends up at the bottom of the tank.

I have personally never used the stuff, but I have heard it works well. There's some good info here on their products.

http://www.seafoamsales.com/products.htm

Ethonol is Hydroscopic so it holds moisture.

Just top it off in the spring, throw in some sea-foam if you are real concerned and change your fuel filter before and after if you are REALLY concerned.

There are pages of discussion about this all over the board.

Thanks for all of the replies, guys. Fortunately, we're down here where we boat all year, so I don't have to worry about storing it for the spring. Guess I'll put some good new gas in it with some octane boost and let 'er rip.

Jason did call when he was here recently. I wasn't able to get down to the beach because of family commitments, but will definitely get there next time.