ok, I talked to a guy tonight that had a turbo on his car. And he said to make sure i run un-detergent oil with my turbo. I dont know much about oil and i have never heard of un-detergent oil before. So is this type of oil real? Did this guy know what he was talking about? And whether its true or not what kind of oil would be the best? I heard mobil 1 and castrol gtx are the best? thanks in advance.