i'm a big believer in 5w40 - the thicker cold weight (over 0w40) helped my start-up rattle. impossible to find mobil 5w40 in Canada, however, so I've been running mobil delvac. it's a diesel oil but also listed for high compression euro cars. has a great detergent pack but slightly lower flash temp than a high performance car-only oil. it's inexpensive and lots of it available up here in big truck land.
I am about to make the move to motul (finally found a reliable distributor - try motorcycle shops if you are having difficulty finding a vendor); i'm a fan of their rbf600 brake fluid and have heard great things about their gear oil and motor oil. my next fill is 5w40 8100 x-cess, then possibly try their 300v.
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