Havent' used my boat much in a couple of years. The gas was treated with Sea Foam, so I think it should be ok. But am not sure. I was thinking about siphoning some out and burning it in my snow blower and car over the winter, so come spring I can add a bunch of brand new gas to the old, what is left in the tank. Problem is, my siphon hose goes in far, but stops. I think it hits a 90 degree elbow. I cannot get it to go all the way down to the gas. Any ideas on how to navigate the 90 degree elbow? If not, I will just hope for the best and leave it in and top off the tank next spring.