If you are using your car for a lot of trackdays or even racing, it would be good to consider using this High Performance Gearbox oil!

This is a 100% synthetic lubricant for all mechanical transmission of high performance and race cars.

For synchronised or not synchronised gearboxes, gearbox/differential, transfer gearboxes and hypoid differentials without limited slip system operating under shocks, heavy loads and low revolution speed or moderate loads and high revolution speed.

0% shear loss: Unshearable oil film in extreme conditions. Very high lubricating power which decreases friction and wear.
90 grade at hot temperature to provide outstanding oil film resistance at hot temperature and/or to reduce transmission noise.
Fluid at low temperature to allow comfortable gear shifting.

You will need three bottles to refresh a gear box.