I'm using Amsoil 0W40 ATV oil.I use it year round.I ride my atv alot in the winter and here in Michigan it can get below 0 degrees.the Amsoil is a full synthetic oil and really helps in cold starting.I buy it at my Napa auto parts store.
Shell Rotella in the blue jug. 5w-40. I have in in my Rincon and its great. It doesn't have any "energy Conserving" properties which is what is recommended by Honda. This is noted in the bottom section of the round oil seal on the back of every bottle of oil. Some say "energy conserving" and some don't. Oil that says "Energy Conserving" has friction modifiers which will cause your auto clutch to slip.
Tell me if I'm wrong but my understanding of Oil number ex. 5w30, 0w40. This is not exactly but close, first number represents what the oil will flow or go thru the engine at colder tempatures. in other words the smaller the number the faster it will flow as it gets colder. The second number represents what the oil can or will protect the componets that the oil is used for. So 0 will flow like water at lower temp vs 5 or 10. And 40 is better protection vs. 30.
Please correct me in any way.
If you can run full synthetic oil and do not have it leaking I would us it because it has the overall protection that any oil. Engines that have run conventinal oils over time may help seal some oil leaks depending on the detergant agents in the oil. But when converting to synthetic some of the componets of the old oil may be broken down and since synthetic oil has smaller molicules an oil leak may occur.
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