1994 Cadillac Seville Owner's Manual - Page 258

What about gasoline with blending materials that contain oxygen (oxygenates), such as MTBE or alcohol? MTBE is "methyltertiary-butyl ether." Fuel that is no more than 15% MTBE is fine for your vehicle. Ethanol is ethylor grain alcohol. Properly-blendedfuel that is no more than 10% ethanol is fine for your vehicle. Methanol is methylor wood alcohol. NOTICE: Fuel that is more than5% methanol is bad for your vehicle. Don't use it. It can corrode metal parts in your fuel system and also damage plastic and rubber parts. That damage wouldn't be covered under your warranty. And even 5% or less, there must at be "cosolvents" and corrosion preventers in this fuel to help avoid these problems. Gusolinesfor CleanerAir Your useof gasoline withdeposit control additives will help prevent deposits from forming in your engine and fuel system. That helps keep your engine in tune and your emissioncontrol system working properly. It's goodfor your vehicle,and you'll be doing yourpart forcleaner air. Many gasolinesare now blended with oxygenates.General Motors recommends that you use gasolines with these blending materials, such as MTBE and ethanol. By doing so, you canhelp clean the air, especially in those parts of the country that have high carbon monoxide levels. In addition, some gasoline suppliers are now producing reformulated gasolines. These gasolines are specially designedto reduce vehicle emissions. General Motors recommends that you usereformulated 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 operators if their gasolines contain deposit control additives and oxygenates, and if they havebeen reformulated to reduce vehicle emissions. 245