I don't believe the results. In particular, the closeness of Red Line 5W-30 and Mobil 1 5W-30 is hard to believe based on the many volatility tests I've done. Amsoil 5W-30 was a little more volatile than M1 0W-40 when I tested them in April 2007. I have some Red Line 5W-30 and M1 0W-40 and I plan to test their volatility soon. I don't know about Amsoil marketing but I do think highly of their oil formulations so please nobody think that I'm pee'ing on anyone's cornflakes.