Honda Power Products HHH25D Manuel De L'utilisateur page 29

Every 10 hours, check the engine oil level and replenish oil up to the
top of the oil filler neck if the engine is operated for more than 10 hours
continuously.
ENGINE OIL CAPACITY: 0.08 L (0.08 US qt, 0.07 Imp qt)
Use 4-stroke motor oil that meets or exceeds the requirements for API
service classification SE or later (or equivalent). Always check the API
service label on the oil container to be sure it includes the letters SE or
later (or equivalent).
SAE 10W-30 is recommended for general use. Other viscosities shown
in the chart may be used when the average temperature in your area is
within the indicated range.
CAUTION:
Using nondetergent oil or 2-stroke engine oil could shorten the engine's
service life.
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OIL FILLER NECK
ENGINE OIL
FILLER CAP
UPPER OIL
LIMIT
AMBIENT TEMPERATURE
UPPER OIL
LIMIT