Honda HSM1380i Manuel De L'utilisateur page 45

Recommended oil
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 5W-30 is recommended for general use.
Lubrication oil specifications necessary to maintain the performance of the
emissions control system: Honda genuine oil.
CAUTION:
• Engine oil is a major factor affecting engine performance and
service life. Nondetergent oils and 2-stroke engine oils are not
recommended because of inadequate lubricating properties.
• Running the engine with insufficient oil can cause serious engine damage.
Tighten the oil filler cap/dipstick securely.
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AMBIENT TEMPERATURE