Our survey of the manufacturers of engines for non-automotive uses -- boats, garden tools, chain saws and snowmobiles -- indicates that oxygenated gasoline will perform satisfactorily in most later-model engines. However, some manufacturers expressed concerns about its use in older engines. The owner's manual is the most authoritative source of information about the fuel requirements of your equipment. If your equipment is older and the manual does not mention oxygenated gasoline, consult an authorized dealer.