Hello,
I continue my restoration. Right now I'm preparing the body parts and I have entrusted the engine, new pistons and new connecting rod bushes to a mechanical workshop ...


However, I have a question: what type of oil should I put in the gearbox ???
The type of Russian oil indicated in the operator's manual is unknown here.
I hesitate between mineral oil sae 50 and mineral oil for car gearbox 75w80 or 80w90.

Please, who can confirm which?

Hi, for a gearbox it will better 80w90, but only with a classification of no more than GL-4, since GL-5 is not designed for clutch in oil

80w90