Honda WMP20X Owner's Manual page 19

PRE-OPERATION CHECKS
Oxygenated Fuels
Some gasolines are 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.
If you use an oxygenated fuel, be sure its pump octane
rating is 86 or higher.
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:
l
Ethanol (ethyl or grain alcohol) 10% by Volume
You may use gasoline containing up to 10% ethanol by
volume. Gasoline containing ethanol may be marketed
under the name "Gasohol".
l
MTBE (methyl tertiary butyl ether) 15% by Volume
You may use gasoline containing up to 15% MTBE by
volume.
l
Methanol (methyl or wood alcohol) 5% by Volume
You may use gasoline containing up to 5% methanol by
volume as long as it 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 mentioned are not covered
under warranty.
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