I just ordered from the Redline sponsor 12qts of Redline 5w-30. With winter coming up, I figured I'd go with the 5w. My engine is very clean and I am even going to run a few remaining ounces of Rx at the end of this 0w-20 run. So the "Redline is cleaning" up excuse won't fly in my car. I was looking over their webpage and from what the experts on here have said, it looks like a great oil. From the base oil to the additive package, this oil is built extremely well. Hope it works.