2W-50, 0W-40 may not be as far apart as it seems
see these charts to understand viscosity ratings
Oil sales are big business for oem's like Polaris. The buy mediocre oils from independent bottlers, put a high price tag on them and sell them thru there dealer network as the only appropriate oil for their equipment. The untold truth is these oils may be not be any better than the cheapest oil found on the shelves of your favorite discount store yet the equipment owner perceives it to be the best oil for his equipment based solely on the say so of the oem.
For years Harley said synthetics would ruin your engine and be a warranty breaker. Then, they came out with their own branded synthetic and it's just fine, in fact highly recommended. I use Mobil 1 exclusively in all my vehicles but I still say that Mobil gives the stuff to GM and Porsche free of charge to use in some of their exclusive products, ie., Corvettes. It's cheap advertising. One fill per new vehicle for free and the new car customer will use that oil in all future oil changes, plus, WOW, if they use it in new Corvettes it must be really good stuff, I'll tell all my friends...... It probably all comes out of the same plastic cow. (Use to come from dinosaurs, ya know)
Polaris does make oil, they sell oil to make more money period.
Example is this recent article in NOLN
Chrysler is making a big push into the oil change business, aiming to get more and more of its nearly 2,200 dealers nationwide to add Express Lube or Express Lane "quick lube" services and bays to their facilities. According to this story, it's working. One dealer quoted in the article is averaging more than 50 cars per day!
and here is the motivation for it
You start with an oil change then you move to tires, to batteries, brakes” and to bigger repairs later in the life of the vehicle, he said.