1993 Chevrolet Cavalier Owner's Manual - Page 200

Service & Appearance Care Fuel (CONTI What about gasoline with blending as materials that contain oxygen, such MTBE or alcohol? MTBE is "methyl tertiary-butyl ether? Fuel that is no more than 15% MTBE is fine for your vehicle. Ethanol is ethyl or grain alcohol. Properly-blended fuel that isno more than 10%ethanol is fine for your vehicle. Methanol is methyl or wood alcohol. Fuel that is more than 5 % methanol is bad for your vehicle. Don't use it. It can corrode metal parts in your fuel system and also damage plasticand rubber parts. That damage wouldn'tbe covered under your warranty. And even at 5 % or less, there must be "cosolvents" and corrosion preventers in th he1 to avoid :lp these problems. Gasolines for Cleaner Air Your use of gasoline with detergent additives will help prevent deposits from forming in your engine and fuel system. That helps keep your engine tune and in your emission control system working properly. It's good for your vehicle, and you'll be doing your part forcleaner air. Many gasolines are now blended with materials called oxygenates. General Motors recommends thatyou use gasolines with these blending materials, such as MTBE and ethanol. By doing so, you can help clean the air, especially in those parts of the country thathave high carbon monoxide levels. - - I98