gearbox oil

[whiterover]

Hi White Rover here.
I am confused as my car manual specifies sae 20 as the grade of oil for the manual gearbox, where as two gearbox specialist I have spoken to say I should use sae 75-90, what does the forum think?
I am getting quite close to transplanting the series two 2200 motor and gearbox into Whiterover. The motor has been rebuilt with new pistons and crank, the gearbox rebuilt with new bearings etc. I have been busy wire brushing and painting lots of metal parts, attending to detail so that the transplant will go smoothly at the time.
John.

 

[chrisyork]

Your gearbox specialists are WRONG. The P6, like all Rover gearboxes, was designed to use engine oil. I think most people nowadays tend to use 20/50 rather than SAE 20, but we're all in the same ballpark!

I have a personal view that an oil such as Millers Classic 20W50 Mini Oil would be worth a punt:

http://www.millersoils.co.uk/automotive/tds-automotive.asp?prodsegmentID=162&sector=Classics

Chris

 

[whiterover]

Thanks for your reply, If Rover says sae 20 well I am sure they had good reason for specifying that. Cheers. John.