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Oxygenated Fuels
Technical Information
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) 10% by volume
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) 15% by Volume
You may use gasoline containing up to 15% MTBE by volume.
METHANOL (methyl or wood alcohol) 5% by Volume
You may use gasoline containing methanol 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.
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