Honda CRF50F 2017 Owner's Manual page 69

ENGINE OIL
Refer to the Safety Precautions on page 50.
Oil Recommendation
A P I
classification
Viscosity
JASO T 903
standard
Suggested Oil
Honda ''4-STROKE MOTORCYCLE OIL''
or equivalent.
58
SG or higher except
oils labeled as energy
conserving or
resource conserving
on the circular API
service label
SAE 10W-30
MA
Your motorcycle does not need oil additives.
Use the recommended oil.
Do not use oils with graphite or
molybdenum additives. They may adversely
affect clutch operation.
Do not use API SH or higher oils displaying
a circular API "energy conserving" or
''resource conserving'' service label on the
container. They may affect lubrication and
clutch performance.
NOT RECOMMENDED
Do not use non-detergent, vegetable, or
castor based racing oils.
OK