My son had the RZR and seen the coolant lvl was a little low. He put a little Zerex asian 50/50 EG hoat non silicate/borate coolant in it. I know that mixing coolants can mess up a engine/cooling system or gel up and am hoping that it will be ok since they are both ethylene glycol. It hasnt gelled up and I was wondering if anybody knows if it will or not...