Thoughts on which is the superior 5W-30? I am switching from Redline (I believe it was dumbed down a bit recently and is no longer worth the price premium) after using it for the last 135,000 miles and am trying to choose between the two for the remaining life of my 2005 Sequoia. I considered PU but it is unavailable at the Wally World here and everywhere else it is more expensive than Amsoil with PC pricing. Amsoil seems to have a slight edge on paper (pour point, Amsoil advertising http://www.amsoil.com/lit/g3115.pdf ) However, the M1 EP pricing at WM is such an amazing deal for a synthetic. I even considered M1 0W-40 but I can't see any advantage over 5W-30 EP.