R100R gearbox to clutch splines need lubricating occasionally, apparently. So I thought after 28 years, it being lock down, I'd better get on with it. Is it Optimol PL or Optimol White paste T, or Honda 60. All three have their advocates on line but the whole subject seems to provoke a lot of words but is light on technical appraisal. It was originally greased with a grey/black grease which I assume was PL. Advice please.