Honda FourTrax Rubicon TRX520FA5 2020, Owner'S Manual

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Technical Information
254
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 for
non-road vehicles:
ETHANOL (ethyl or grain alcohol) up to 10% by volume.
You may use gasoline containing up to 10% ethanol by volume.
Gasoline containing ethanol may be marketed under the name
“Gasohol”.
Do not use gasoline containing more than 10% ethanol by volume.
The use of gasoline containing a higher percentage (e.g. E15, E20,
E85) of ethanol has not been approved for use in this vehicle and
may cause starting and/or performance problems and can also
damage metal, rubber, and plastic parts of the fuel system and are
not be covered by the Distributor’s Limited Warranty.