1995 Oldsmobile 88 Owner's Manual - Page 229

you're accelerating ordriving up a hill. That's normal and you don'thave to buy a higheroctane fuel to get rid of pinging. It'sthe heavy, constant knock that means you have a problem. What about gasoline with 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. Gasolines for Cleaner Air Your use of gasoline with deposit control additives will help prevent deposits from forming in yourengine and fuel system. That helps keep yourengine in tune and your emission control system working properly. It's good for your vehicle, and you'll doing your part be for cleaner air. Ethanol is ethyl or grain alcohol.Properly-blended fuel that is no more than 10%ethanoE is fine for your vehicle. Methanol is methylor wood alcohol. 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, especially in those parts of the country that have high carbon monoxide levels. I I In addition, some gasoline suppliers are now producing reformulated gasolines. These gasolines are specially NOTICE: designed toreduce vehicle emissions. General Motors Fuel that is more than methanol is bad 5% for recommends that you reformulated gasoline. By use your vehicle. Don't use it. It can corrode metal doing so, you can help clean the air, especially those in parts in your fuel system and also damage plastic parts of the country thathave high ozone levels. and rubber parts. That damage wouldn't be You should ask your service station operators their if covered under your warranty. And even5% or at gasolines contain deposit control additives and less, there must be "cosolvents" and corrosion oxygenates, andif they have been reformulated to preventers in this fuel to help avoid these reduce vehicle emissions. problems. I 6-5