1993 Oldsmobile Silhouette Owner's Manual - Page 220

Service & Appearance Care "z Gasolines for Cleaner Air In addition, some gasoline suppliers are Your use of gasoline with detergent additives will help prevent deposits from now producing reformulated gasolines. forming in yourengine and fuel system. These gasolines are specially designed That helps keep yourengine in tune and to reduce vehicle emissions. General your emission control system working Motors recommends thatyou use properly. It's good for your vehicle, and reformulated gasoline. By doing so, you you'll be doing your part for cleaner air. can help cleanthe air, especially in those parts of the country thathave high Many gasolines are now blended with ozone levels. materials called oxygenates. General You should ask your service station Motors recommends that you use gasolines with these blending materials, operators if their gasolines contain detergents and oxygenates, andif they such as MTBE and ethanol. By doing have been reformulated to reduce so, you can help clean the air, especially vehicle emissions. in those parts of the country that have high carbon monoxide levels. Fuels in Foreign Countries If you plan on driving in another country outside the U.S. or Canada, unleaded fuel may be hard to find. Do not use leaded gasoline.If you use even one tankful, your emission controls won't work well or at all. With continuous use, spark plugs can get fouled, the exhaust system cancorrode, and your engine oil can deteriorate quickly. Your vehicle's oxygen sensor will be damaged. Allof that means costly repairs that wouldn't be covered by your warranty. 218