Pre-Operation Check; Recommended Oil - Honda EU20i Owner's Manual

4.

PRE-OPERATION CHECK

Be sure to check the generator on a level surface with the engine
stopped.
1. Check the engine oil level.
Using non detergent oil or 2-stroke engine oil could shorten the
engine's service life.

Recommended oil

Use 4-stroke motor oil that meets or exceeds the requirements for API
service category 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).
AMBIENT TEMPERATURE
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 recommended range.
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