I just purchased a 2007 sportsman 700 and want to do some maintenence on it. The factory owners manual says to use Polaris premium 4 season oil 0w-40
The Polaris chart online and at the dealership says ps-4 5w-50
I find it odd that these two recommendations from Polaris contradict each other. I am sure that either would be fine but would like to know what to use and why. Did Polaris update the spec since 2007 and the ps-4 is now the oil of choice? Thank you in advance!