1994 Buick Skylark Owner's Manual - Page 209

Ethanol is ethyl or grain alcohol,. Properly-blended fuel 10% that is no more than ethanol isfine for your vehicle. Methanol is methyl or wood alcohol. NOTICE: Fuel that is more than 5% methanol is bad for your vehicle. Don'tuse it. It can corrode metal parts in your fuel system andalso damage plastic ahd rubber parts. That damage wouldn't be covered under you'r warranty. even at5% And or less, theremust be "cosolvents'' and corrosion preventers in this fuel to help avoid these ,problems. I Gasolines for Cleaner. Air Yuu..useof-gas-olin~~wi~h.deposit ..= . contra1 agditives. will.. help pf$v&jt . . from fdMffig,&iou-f.e>fig-&ze, ti~;d ..fueliq',&em..That'fielps . keep youi &gifie~in'tG&'aifd < , - >>. . . 9,; ., %3 . ,. ~ ' . 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 oxygenates. General Motors recommends that you use gasolines with