Honda EU10i Manuel De L'utilisateur page 22

NOTE:
Gasoline spoils very quickly depending on factors such as light exposure,
temperature and time.
In worst cases, gasoline can be contaminated within 30 days.
Using contaminated gasoline can seriously damage the engine (carburetor
clogged, valve stuck).
Such damage due to spoiled fuel is disallowed from coverage by the warranty.
To avoid this please strictly follow these recommendations:
• Only use specified gasoline (see page 17).
• Use fresh and clean gasoline.
• To slow deterioration, keep gasoline in a certified fuel container.
• If long storage (more than 30 days) is foreseen, drain fuel tank and carburetor
(see page 45).
Gasolines Containing Alcohol
If you decide to use a gasoline containing alcohol (gasohol), be sure its octane
rating is at least as high as that recommended by Honda.
There are two types of ''gasohol'': one containing ethanol, and the other
containing methanol.
Do not use gasohol that contains more than 10% ethanol.
Do not use gasoline containing more than 5% methanol (methyl or wood
alcohol) and that does not also contain co-solvents and corrosion inhibitors for
methanol.
NOTE:
• Fuel system damage or engine performance problems resulting from the use
of gasoline that contains more alcohol than recommended is not covered
under the warranty.
• Before buying gasoline from an unfamiliar station, first determine if the
gasoline contains alcohol, if it does, find out the type and percentage of
alcohol used.
If you notice any undesirable operating symptoms while using a particular
gasoline. Switch to a gasoline that you know contains less than the
recommended amount of alcohol.
19