The BSA Workshop > Twins



I am in the process of ordering engine oil, fork oil & grease.
Unfortunately the lubricants in the hand book are not easily obtained.
What oils do other members use in their BSA's?

1958 SS

Morris classic 20/50 for everything.

B31 is on Castrol XXL (straight 40) 'cos I 've got gallons of the stuff. The A7 is also currently on XXL but is usually on Morris's 20-50. The A10 is on Morris's 20-50.
Really it's a question of good quality monograde oil or good quality multigrade. My general rule of thumb is monograde for roller bearing big ends, multigrade for plain big ends.
There is massive discussion elsewhere on the levels of ZDDP additive in classic oils against the reduced levels in current oils which have to avoid contaminating exhaust catalysts.
The bottom line is that any reputable oil changed reasonably regularly will do the job. 

Here is a good article regarding lub:-


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