MGB Gearbox Oil
Discussion
I was about to put fresh oil in my re-build box, I looked in the Haynes to check capacity and was surprised to see the recommendation of 20/50, I was expecting EP80/90.
I just Googled and I see this is a common question, from what I can see the consensus seems to be 20/50 in a box with OD but better to use EP in non-OD box. My box in non-OD, 4 synchro, early 60's and will be used for circuit racing. I would prefer to use EP, would you agree?
I just Googled and I see this is a common question, from what I can see the consensus seems to be 20/50 in a box with OD but better to use EP in non-OD box. My box in non-OD, 4 synchro, early 60's and will be used for circuit racing. I would prefer to use EP, would you agree?
I was also confused when I first went to change my BGT's gearbox oil, having previously had a V8 as the V8 uses EP, which seems more correct for a gearbox. However the correct grade is 20/50. My MGA which is the same gearbox as an early B uses SAE 30,which is also recommended for the earlier B series engine. I think that 20/50 is acceptable as a later standard, not available when the MGA was introduced.
Try and track something down similar to this. Most modern oils eat brass.
https://www.penriteoil.com.au/applications/special...
https://www.penriteoil.com.au/applications/special...
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