Oxygenated Fuels - Honda 1992 Accord Coupe Owner's Manual

Gasoline
Your Honda operates most effectively on premium unleaded gasoline with a
pump octane number of 86 or higher. Use of a lower octane gasoline can cause
a persistent, heavy metallic rapping noise in the engine that can lead to
mechanical damage.
We recommend gasolines containing detergent additives that help prevent fuel
system and engine deposits.
Using gasoline containing lead will damage your car's emission controls. This
contributes to air pollution and can void certain parts of your warranty.

Oxygenated Fuels

Some conventional gasolines are being blended with alcohol or an ether
compound. These gasolines are collectively referred to as oxygenated fuels. To
meet clean air standards, some areas of the United States and Canada use
oxygenated fuels to help reduce emissions.
If you use an oxygenated fuel, be sure it is unleaded and meets the minimum
octane rating requirement.
Before using an oxygenated fuel, try to confirm the fuel's contents. Some
states/provinces require this information to be posted on the pump.
The following are the EPA-approved percentages of oxygenates:
ETHANOL (ethyl or grain alcohol) - You may use gasoline containing up to 10%
ethanol by volume. Gasoline containing ethanol may be marketed under the
name "Gasohol."
MTBE (Methyl Tertiary Butyl Ether) - You may use gasoline containing up to
15% MTBE by volume.
METHANOL (methyl or wood alcohol) - You may use gasoline containing up
to 5% methanol by volume as long as it also contains cosolvents and corrosion
inhibitors to protect the fuel system. Gasoline containing more than 5%
methanol by volume may cause starting and/or performance problems. It may
also damage metal, rubber, and plastic parts of your fuel system.
If you notice any undesirable operating symptoms, try another service station
or switch to another brand of gasoline
Fuel system damage or performance problems resulting from the use of an
oxygenated fuel containing more than the percentages of oxygenates given
above are not covered under warranty.