Originally Posted by One_Quick_Z

I am not too sure about Royal Purple I have heard about the Viscosity breaking down... one of which is the company my father works for they use it in their trucks and he said they have had nothing but engine problems related to the oil... wether thats true or not its enough for me to stay away from it..... I used mobil 1 syn. in myt 06 350Z and this time im going to use Amsoil in the 370Z


DAN