1993 Cadillac DeVille Owner's Manual - Page 275

What about gasoline with blending materials thatcontain oxygen, such as MTBE or alcohol? MTBE is "methyl tertiary-butyl ether." Fuel that is no more than 15% MTBE is fine foryour car. Ethanol is ethyl or grain alcohol. Properly-blended fuel that is no more than 10% ethanol is fine for your car. Methanol is methyl or wood alcohol. 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 in tune and your emission control system workingproperly. 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 Motorsrecommends that you use gasolines with these blending materials, such as MTBE and ethanol. By doing so, you can help clean the air,especially inthose parts of the country that have high carbon monoxide levels. In addition, some gasoline suppliers are now producing reformulated gasolines. These gasolines are specially designed to reduce vehicle emissions. General Motorsrecommends that you use reformulated gasoline. By doing so, you can help clean the air,especially inthose parts of the country that have highozone levels. You should ask your service station operatorsif their gasolines contain detergents andoxygenates, and if they have been reformulated to reduce vehicle emissions. 262