Honda FRC800 Owner's Manual page 31

Fuel can damage paint and plastic. Be careful not to spill fuel when
filling your fuel tank. Damage caused by spilled fuel is not covered
under warranty.
FUEL RECOMMENDATIONS
This engine is certified to operate on unleaded gasoline with a pump
octane rating of 86 or higher.
You may use regular unleaded gasoline containing no more than 10%
Ethanol (E10) or 5% Methanol by volume. In addition, Methanol must
contain cosolvents and corrosion inhibitors.
Use of fuels with content of Ethanol or Methanol greater than shown
above may cause starting and/or performance problems. It may also
damage metal, rubber, and plastic parts of the fuel system.
Engine damage or performance problems that result from using a fuel
with percentages of Ethanol or Methanol greater than shown above
are not covered under warranty.
Never use stale or contaminated gasoline or an oil/gasoline mixture.
Avoid getting dirt or water in the fuel tank.
SERVICING YOUR TILLER
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