Why Classic Mini Engine Cant Use Semi Synthetic Oil Or Synthetic Oil?

any people can tell me?

I think it’s because it eats the oil seals.

This has been covered to death please do a search and you will find so many topics on it!

EDIT : Actually that was bit short of me. Sorry ive had a bad day.

Check out this thread here and you should find everything you need to know

Clicky

Yes this has been covered many times - we don’t need more and more oil topics - so I’m going to close this thread - please use the search function before posting new topics as there is a very high chance that things have been covered before… and have a look in the FAQ section, there is a very comprehensive thread already in there on this very subject

thanks