1990 Honda Accord Owner's Manual - Page 58
1990 Honda Accord Manual
Page 58 highlights
NOTE: Fuel system damage or vehicle performance problems resulting from the use of such fuels is not covered under the new car warranties. Honda cannot endorse the use of fuels containing methanol since evidence of their suitability is as yet incomplete. Before purchasing fuel from an unfamiliar station, try to confirm whether the fuel contains alcohol, of what kind, and how much. If you notice any undesirable operating symptoms after using a gasoline that contains alcohol; or one that you think contains alcohol, switch to an unleaded gasoline as recommended on page 56. Operation In Foreign Countries In order to comply with U.S. Federal Emissions Regulations, you must use unleaded fuels of the recommended octane rating. These fuels may not be available in other countries. If you intend taking your car outside the U.S. or Canada, write to American Honda Consumer Affairs (stating the year and model of your car) at the address below for information regarding modifications you may need to have done. American Honda Motor Co., Inc. Consumer Affairs 1919 Torrance Blvd. Torrance, CA 90501-2746 (cont'd)