Pre-Operation Check - 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 high-detergent, premium quality 4-stroke engine oil, certified to
meet or exceed U.S. automobile manufacturer's requirements for API
Service Classification SG, SF.
Select the appropriate viscosity for the average temperature in your
area.
AMBIENT TEMPERATURE
16