1995 Pontiac Bonneville Owner's Manual - Page 217

Gasolines for Cleaner Air Your use of gasoline with deposit control additives will help prevent deposits from forming in your engineand fuel system. Thathelps keep your engine in tune and your emission control systemworking properly. It's good for your vehicle, and you'll be doing your R&.fQr cleaner air. 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 theair, 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 designed toreduce vehicle emissions. General Motors recommends that you use reformulated gasoline. By doing so, you can help clean theair, especially in those parts of the country that have high ozone levels. You should ask your service station operators if their gasolines contain deposit control additives and oxygenates, an'dif they have been reformulated to reduce vehicle emissions. Fuel 3808 Supercharged Engine (Code1) The 8thdigit of your vehicle identification number (VIN) shows the codeletter for your engine. You will find the VIN at the top left of your instrument panel. (See "Vehicle Identification Number" in the Index.) 91 Use premium unleaded gasoline rated at octane or higher. You may use middle grade or regular unleaded gasolines, but your vehicle may not accelerateas well. The gasolineyou use should meet specifications ASTlM D4814 in the United States and CGSB 3.5-92 i Canada. These fuels should have the n proper additives, so you should not have to add anything to the fuel. In the United States and Canada, it's easy to be sureyou get the right kind of gasoline (unleaded).You'll see UNLEADED right on the pump. And only unleaded nozzles will fit into your vehicle's filler neck. Be sure the posted octane forpremium is at least 91 (at least 89 for middle grade and for regular). If the 87 octane is less than 87, you may get a heavy knocking can noise when you drive. If it's bad enough, it damage your engine. 6-4