1994 Chevrolet Astro Owner's Manual - Page 222

Ethanol is ethyl or grain alcohol. Properly-blended fuel that is no more than 10% ethanol is fine for your vehicle. Methanol is methylor wood alcohol. NOTICE: Fuel that is more than methanol is bad for your vehicle. 5% 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. even at5% or less, there And must be "cosolvents" and corrosion preventers in this fuel to help avoid these problems. Gasolines for Cleaner Air Your use ofgasoline with deposit control additives will help prevent deposits from formingin 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 doing your part cleaner air. for 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 countrythat 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 that use reformulated gasoline. you 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 deposit control additives and oxygenates, and if they have been reformulated to reduce vehicle emissions. 6-4