"Was gonna use the artic cat 0w40 syn. kit, But was told by the delaer not to use the syn. oil in the machine,that it would make the clutch slip"
Arctic Cat syn is specifically designed to avoid this problem. Just don't try it with automotive synthetic
Make sure you clarify your question with the dealer and ask it again- maybe from the service people. If he/they repeat the same thing, RUN AWAY!