The problem in the United States is the use of ethanol in the gasoline. By law the petroleum companies must use so much unless they can get a waver. In the states the ethanol is usually made from corn. At the time of the law, corn was a very low price and oil was getting scarce so they decided the adding ethanol usually 10% would be a good thing . Chillin is correct the problem is the carburetor. New cars have carburetor's that are designed to accommodate the ethanol. Your one cycle engines like for weed eaters, lawn mowers, chain saws, etc do not have carburetor that will accommodate the ethanol. The ethanol forms a varnish in the carburetor and they will soon cease to run. You can still buy gasoline in some station's without ethanol and I buy it for all my equipment and old tractors. My new truck I use the ethanol gasoline and so far no problems. Corn is at record prices now and there is sufficient oil so there is an effort to do away with the ethanol law. Once a law is on the book sometimes its hard to change it but there is a world wide shortage of corn and it is needed for food and feed.