Gear box oil

[Scoobydoobydan]

Which oil is best to use for a Classic WRX STI Import V1 '94 model??

Thanks in advance

[Scoobyghost]

The ultimate question [emoji23]

Opinions always divide.

I've used Shell helix and now I'm using Miller's cfs. Not saying any is best but they work for me. I get good temperatures and good pressures. I'm on 168k miles.

[Scoobydoobydan]

What grade is best??

75-90?

[Scoobyghost]

Whoops. Read as engine oil not gearbox. My bad. I have 85w90 in mine. Just gotta make sure it's EP(extreme pressure)

[Scoobydoobydan]

Just getting a new clutch fitted and changing the gearbox oil too, but the garage is saying his suppliers are saying EP and non-EP?? Not sure if either will matter?? The car isn't tracked or raced....

[Scoobyghost]

Opie recommend ep75w90. Motul 300.