Is it OLD Motul 300 gear or new Motul 300 gear?
The VOA is from 2006. Did they change it after that?
It looks like the current Gear 300 is rated only GL5, has VI of 161 and has a 16.4cSt viscosity.
Viscosity grade SAE J 306 75W-90
Density at 20°C (68°F) ASTM D1298 0.904
Viscosity at 40°C (104°F) ASTM D445 109.6 mm²/s
Viscosity at 100°C (212°F) ASTM D445 16.4 mm²/s
Viscosity index ASTM D2270 161
Flash point ASTM D92 200°C / 392°F
Pour point ASTM D97 -42°C / -43.6°F https://s3-eu-west-1.amazonaws.com/motul....pdf?1492016023