I just bought a 2011 rzr 900 xp from my cousin 3 days ago, I let my brother take it for a spin and he decided to drive up the river, it didn’t get submerged but it died on him and took a while to get it started back, he then drove it about a mile back to my house. He told me what happened and I checked the oil and sure enough looked like milk. I changed the oil like 8 times before it became oil again and also changed the rear diff fluid. I took it for a ride today and its just not running the same as when I first got it, IT is dieing and just doesn’t feel right, anything else I should do?