What is the best gearbox oil to use???

[Steve]

I use mobile 1 in the engine, it would be terrible manners to use an inferior oil in the gearbox

ive heard about slick 50 but are there any better ones

Cheers

 

[Tom]

Castrol Syntrax. Slik50 is an additive and a bad one at that. Keep it away from your car!