Honda FE500 Owner's Manual page 20

4. If the level is low, fill to the top of the oil filler neck with the recom-
mended oil.
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).
Using nondetergent oil or 2-stroke engine oil will shorten the engine's
service life.
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.
18
AMBIENT TEMPERATURE