Just got this back from RP about what they recommend:
Good morning Barry,
For your 2013 Polaris Ranger 900XP we recommend the following:
If Polaris factory warranty is still a concern we recommend using an oil that is specified in your Polaris owner’s manual.
Typically it will be a Polaris oil.
Our primary recommendation is Royal Purple Max Cycle 10W-40 (part #01315, quart bottle)
Max Cycle: Max-Cycle Synthetic Engine Oil for Motorcycles | Royal Purple
As a slightly less expensive alternative to Max Cycle you can also safely use Royal Purple HPS 10W-40 (part #31140, quart bottle)
HPS: HPS - High Performance Street Motor Oil | Royal Purple
We also recommend the following for your Polaris:
Polaris although makers of excellent ATVs and UTVs, provides ambiguous and occasionally changing fluid recommendations for their vehicles. Our recommendations are based on what we could determine based on the scant information released on the Polaris lubricants, and extensive field use by our many Royal Purple customers who are also Polaris owners.
Please see below for the Polaris fluids we have identified and the RP fluids we recommend as replacements. If warranty compliance is a serious concern for you we recommended sticking to the OEM fluids during the warranty period.
Polaris Angle Drive fluid: Royal Purple Max Gear 75W-90 part #01300, quart bottle);
Polaris AGL Gear Case Lube: Royal Purple Synchromax (part #01512, quart bottle);
Polaris Demand Drive Fluid: Royal Purple Synchromax (part #01512, quart bottle);
For a PVT transmission
(Polaris version of a CVT or Continuously Variable Transmission), based on what we have seen being used by our competitors as replacements our Royal Purple Max ATF (part #01320, quart bottle), or Royal Purple Synchromax (part #01512, quart bottle)
will work well.
Royal Purple Max Clean (part #11722, 20oz bottle)
Max Clean: Max-Clean Fuel System Cleaner for Maximum Fuel System Performance | Royal Purple
Cooling System: Purple Ice (part #01600, 12oz bottle)
Purple Ice: Purple Ice® - Radiator Coolant Additive | Royal Purple
Grease: Royal Purple Ultra Performance Grease (part #01312, 14oz tube)
(chassis lube points)
UPG: Ultra-Performance Grease | Royal Purple
Thanks for choosing Royal Purple and have a great day!