1995 Oldsmobile Silhouette Owner's Manual - Page 263

of pinging. It's the heavy, constant knock that means you have a problem. What about gasolinewith blending materials that contain oxygen (oxygenates), such as 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 orgrain alcohol. Properly-blended fuel that is no more than 10% ethanol is fine foryour vehicle. Methanol is methyl or wood alcohol. Gasolines for Cleaner Air Your use of gasoline with deposit control additives will help prevent deposits from forming in your engine and fuel system. That helps keep your engine in tune and your emission controlsystem working properly. It's good for your vehicle, and you'll be doing your part for cleaner air. Many gasolines arenow blended with oxygenates. General Motors recommends that you use gasolines with these blending materials, such as MTBE and ethanol. By doing so, you can help cleanthe air, especially in those parts of the country that have high carbon monoxide levels. In addition, some gasoline suppliersare now producing reformulated gasolines. These gasolines are specially designed to reduce vehicle emissions.General Motors recommends that you use reformulated gasoline. By doing so, you can help clean the air, especially in those parts of the country that have high ozone levels. You should ask your service station operators if their gasolines containdeposit control additives and oxygenates, and if they have been reformulated to reduce vehicle emissions. I NOTICE: Fuel that is more than methanol is bad for 5% 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 at less, there must be "cosolvents" and corrosion preventers in this fuel help avoid these to problems. 6-3