Any oil, 5w40, 5w50, 10w30, 10w40, 20w50 15w50 (which I use in my race engine) or 0w20 of any brand is fine - Polaris does not make oil, they buy it from a refiner, distiller or blender. Call Texaco or Penzoil, order 10 million quarts of oil blended to your specifications and tell them you want labels that brand it as Bob's Oil. After negotiations a convoy of semi's will show up at your door step with Bob's Oil ready for sale to the public.
What ever oil you decide to use, try to stick with it - it's not a good idea to blend you own oil, but most oils are compatible with others - when in a pinch any oil is better than no oil - it's a rare reaction when mixing oils results in an undesirable concoction, but it is possible.
If it's JASO rated, it's a plus, but not a requirement - JASO is approved for wet clutches, but it lasts longer in non wet clutch engines.
As for oil filters - anything but Fram - I would reuse an old filter ahead of installing a Fram - I use Hi Flo filters almost exclusively and I suspect K&N filters are made by Hi Flo (a Hi Flo HF204 is a KN-204) - $9 for a spin on in most cases - Wix and NAPA filters are fine also
Shop Owner and Mechanic with over 50 years experience
Last edited by latebird; 09-16-2019 at 12:54 PM.
Reason: I left out 5w20 oil which I use in my car and truck