Hey D,
I think the Artic Cat and Suzuki are about the same 4 wheelers from what I have heard. My 2000 Suzuki 500 4x4 has been ridden hard and it keeps on ticking... I use synthetic oil and militec 1 oil additive and change it every other year whether it needs it or not...
the older arctic cats have Suzuki motors. All way up to 07 or 08 models. Arctic cat didn't have ther own motors til they came out with the h1s. Now all arctic cats have h1 motors and they are tough