Honda WX15 Owner's Manual page 33

4.With the engine in a level position, fill with the recommended oil to
the upper limit of the oil filler neck (see page 32).
Add the engine oil slowly and do not let it overflow, as the engine oil
tank capacity is small.
Engine oil capacity: 8 oz (0.25 L)
5.Reinstall the oil filler cap securely.
OIL FILLER CAP
UPPER LIMIT
SERVICING YOUR PUMP
31