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Polaris recommends the use of Polaris PS-4 PLUS Performance Syn-
thetic 2W-50 4-cycle oil or a similar oil for this engine. Oil may need to
be changed more frequently if Polaris oil is not used. Always use 2W-50
oil. Follow the manufacturer's recommendations for ambient tempera-
ture operation. See page 137 for the part numbers of Polaris products.
Mixing brands or using a non-recommended oil may cause serious engine
damage. Always use the recommended oil. Never substitute or mix oil