Engine Oil Recommendations - Honda EP1000 Owner's Manual

SERVICING YOUR GENERATOR

ENGINE OIL RECOMMENDATIONS

Oil is a major factor affecting engine performance and service life.
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).
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.
AMBIENT TEMPERATURE
35