Honda EM3800SX Owner's Manual page 72

Engine Oil
The generator is shipped
WITHOUT OIL in the engine.
Place the generator on a level
surface. Add enough of the
recommended oil to bring the
oil level to the top of the oil
filler neck.
AMBIENT TEMPERATURE
Use a 4-stroke motor oil that
meets the requirements for
API service category SJ or
OIL FILLER HOLE
later (or equivalent).
SAE 10W-30 is recommended
for general, all-temperature
use. Other viscosities in the
chart may be used when the
temperature in your area is
within the indicated range.
Do not overfill the engine
with oil. If the engine is
OIL FILLER CAP/DIPSTICK
overfilled, the excess oil may
get transferred to the air
cleaner housing and air filter.
UPPER LEVEL
Fuel
Refer to page 31 .
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