I got a 2013 Polaris 500 sportsman. I change the fluids every spring regardless of miles, I dont use it a whole lot mostly plowing snow in the winter. In the motor I use the cheapest 5w40 I can find at the time, usually Motomaster 5w40 diesel oil. Transmission gets 5w20 VWB as its what I always have on hand, and the front diff gets Motorcraft mercon lv, again because its what I have around. So far 2000km of trouble free use. Weird how it hasnt blown up without those pricey polaris oils, especially the 2w50 motor oil. For grease I use regular ol red tack grease on the u-joint and bushings.
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