1993 Pontiac Bonneville Owner's Manual - Page 225

Service & Appearance Care :#el (CONTI 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 andrubber 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. Gasolines for Cleaner Air Your use of gasoline with detergent additives will help prevent deposits from forming in your engine 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 be doing your part for cleaner air. Many gasolines are now blended with materials called 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 pa@ of the country that have high carbon monoxide levels. In addition, some gasoline suppliers are now producing reformulated gasolines. These gasolines are specially designed to reduce vehicle emissions. General Motors recommends thatyou 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 contain detergents and oxygenates, and they if have been reformulated to reduce vehicle emissions. bel Capacity: 18 U.S. Gallons (68L). Ise unleaded fuel only.