Honda 2003 ST1300lA Owner's Manual page 186

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
above are not covered under warranty.
Oxygenated fuels can damage paint and plastic. Be careful not to spill fuel when
filling the fuel tank. Wipe up any spills immediately.
NOTICE
Oxygenated f uels can damage paint and plastic. Damage caused by spilled f uel
is not covered by warranty.
Oxygenated Fuels
Technical Information
185