I have been buying Polaris atvs, since 1993. Polaris has always had the goofiest weights and the stupidest names for their lubes. "angle shaft lubericant", is really gear oil for the front gear box. Polaris does this only to confuse you. As far as real riders and bench riders, well racers get most of thier high dollar lubes thru sponsers and the Daytona beach riders on the 50,000 bikes, they couldnt even tell you where the oil goes in them or what it is, if they can afford to pay that, they get them serviced. Real life here, I would not hesitate to put 15w40 diesel oil in anything, car, truck, bike, or quad. Its a stout oil, its for mixed fleets and its designed to be all purpose. I talk from experience and 15 years in trucking. polaris atvs are probably the easiest on oil of any of the above mentioned machines and to think you need anything more is just insane.