There is a controversy right now about whether or not the ethanol in our fuel supply is hurting the small engines on outdoor power equipment.
There have been news stories talking about the problem. Ethanol supposedly causes a breakdown of some parts and also releases built up sludge in the fuel system. Everything gets clogged up. The gas companies claim that as long as the percentage is low there wont be a problem.
I don’t know which side is right. We do have a product that will prevent the problem though. It is a pre-mixed gas and oil that contains no ethanol.
The only catch is that it costs a good deal more than mixing it yourself. I think it is worthwhile for people who have a small yard and don’t use a lot of mixed fuel. The shelf life is about 2 years.