1994 Pontiac Bonneville Owner's Manual - Page 197

Service & Appearance Care Gasolines for Cleaner Air 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 is no more than 10%ethanol is fine for your vehicle Methanol is methyl or wood alcohol. 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 control system working properly. It's good for your vehicle, and you'll be doingyour part for cleaner air. r NOTICE: 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 plastic and rubber parts. That damage wouldn't be covered under your warranty. And even at 5% or less, there must be "cosolvents" and corrosion preventers in this fuel to help avoid these problems. .. 196 Many gasolines are now 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 clean the air, Countries especially in those parts of the country that have high carbon monoxide levels. If you plan on drivingin another country outside theU.S. or Canada, unleaded fuel In addition, some gasoline suppliers are may 'behard to find. Do not use leaded now producing reformulated gasolines. gasoline. If you use even onetankful, your These gasolines are specially designed to emission controls won't work well or at reduce vehicle emissions. General Motors all. With continuous use, spark plugs can recommends that you use reformulated get fouled, the exhaust system can corrode, gasoline. By doing so, you can help clean and your engineoil can deteriorate quickly. the air, especially in those parts of the Your vehicle's oxygen sensorwill be country that have high ozone levels. damaged. All of that means costly repairs that wouldn't be covered by your warranty. You should ask your service station operators if their gasolines contain deposit To check on fuel availability, ask auto an control additives and oxygenates, and if club, or contact a major oil company that they have been reformulated to reduce does business in the country where you'll vehicle emissions. be driving.