Rover PG1 fully synthetic gear oil, we all know the problems associated with the turbo gearboxes, it is critical these gearboxes use the correct oil. Until now this meant using the Rover MTF 94 oil which is OK but no comparison to the superb fully synthetic Amsoil which is 100% compatible with the Torsen differential, it is also suitable for all other PG1 type boxes found in all 1.8 and 2 litre Rover, MG and Elise.