Forgot all about that, I remember reading it now. Although I doubt much has changed, it has been 7 months. And that was back in the begining of the cj-4 days, so we will see. Plus I want a baseline for my UOA. I ended up going with the 5w40 for it's higher HTHS (motor is spec'd 20w50 in the summer) and higher FP (prob less VII). I'm hoping to run this OCI to 15k ~2 years! That and the shop didn't have the 0w40 yet! But I did find out they have a full line of Brad Penn, Joe Gibbs, Redline, and Mobil One.