You can find whatever oil you need online. For a couple quarts a year, it's worth it. For example, my Polaris RZR requires Polaris PS4. I'd often heard that Mobile 1 full synthetic was a good one for it. Wrong. I had the oil pressure relief valve plug up. It's a $10 part but very expensive to replace because of all the labor to get at it. It's way down inside the engine. They said the PS4 has a special additive to prevent that from happening and that owners who use it never have the problem. Using Mobile 1 only saves a couple $ a year but could cost you FAR more than that.
