Yamaha 4SH-28199-67 Owner's Manual page 118

Engine oil/Transfer gear oil
Make sure the engine oil/transfer gear oil is at
the specified level. Add oil as necessary. (See
pages 8-13 ~ 8-25.)
Recommended oil:
-20° -10° 0°
5W/30
Recommended engine oil classification:
API Service SE, SF, SG type or higher
5-13
10° 20° 30° 40°
10W/30
10W/40
15W/40
20W/40
20W/50
EBU00492
50°C