Polaris 2008 Ranger RZR - Manual (Page 85)

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MAINTENANCE
Engine Oil
Always check and change the engine oil at the intervals outlined in the
Periodic Maintenance Chart beginning on page 75. Always change the
oil filter whenever changing oil.
Premium 4 Synthetic Oil
Polaris Premium 4 All Season Synthetic engine oil has been specially
formulated for use in Polaris 4-cycle engines. It's a fully synthetic, high
performance, multi-viscosity oil designed to provide the ultimate in
lubrication performance and protection. See page 128 for the part num-
bers of Polaris products.
Premium 4 possesses unsurpassed film strength over the widest possible
temperature range. It resists viscosity and frictional breakdown in ambi-
ent temperatures from -40 ° to +120° F. (-40° to +49° C.). Its exceptional
frictional properties result in more efficient operation, more power out-
put and lower fuel consumption.
Although Polaris Premium 4 is the only oil recommended for use in this
engine, use of any API certified "SH" oil is allowable as long as it's 0W-
40. Oil may need to be changed more frequently if Polaris Premium 4 is
not used. Follow the manufacturer's recommendations for ambient tem-
perature operation.
CAUTION
Mixing brands or using a non-recommended oil may cause serious engine
damage. We recommend the use of Polaris Premium 4 All Season synthetic
oil or API certified "SH" oil, 0W-40. Never substitute or mix oil brands. Use
only 0W-40.
WARNING
Vehicle operation with insufficient, deteriorated, or contaminated engine oil
will cause accelerated wear and may result in engine seizure, accident, and
injury. Always perform the maintenance procedures as outlined in the
Periodic Maintenance Chart.