If it’s running good with what you’ve been running why change it. I have a Polaris Ranger and a 570 Sportsman. I run Amsoil in them with no problem. I will say my usual Amsoil dealer was out of Amsoil when I changed the oil in my Ranger last so I used Mobil 1. I could definitely tell a difference in how the engine ran. For some reason the Amsoil seems to run a little quieter than the Mobil 1. I have Amsoil to do another oil change, I just need to get off my butt and do it.
