2008 Polaris Ranger RZR Service Manual, Page 58Get this manual
ENGINE 10Add Polaris Premium Antifreeze to the radiator filler neck if the level goes downIf no bubbles are seen at the filler neck, the system should be purged of air
GENERAL ENGINE SERVICE
Engine Lubrication Specifications
WARNING
Be sure to install the pressure cap before shutting off the engineCoolant may spit out of the radiator11Stop the engine and let cool, top off the radiator filler neck with coolantIf you hear or see "glug" at the filler neck, or there is dropping of the coolant level, indicating that coolant has been pulled into the system; Fill the recovery bottle only after you have completely filled the cooling system at the radiator filler neck12Repeat this procedure, if overheating still occurs=CapacityApproximately U.SQuarts (1.9 L) Oil TypePolaris Premium 0W-40 Synthetic Filter WrenchPV-43527 or equivalentOil Pressure Specification 27-35 psi 6000 RPM, Polaris 0W-40 Synthetic, Engine at operating temperature