This is true.....if there's a superior blend, I'd want to spring for it. If it happens to be cheaper than TWS, then BOOYA!
I don't discount Castrol/BMW M's partnership on creating the TWS blend, but I have a tough time believing that they update the blend throughout the years to keep up-to-date with available improvements. Whereas on the other hand, these other 10w60 options/blends came out just recently, so I'd think the R&D is recent and could benefit our motors?
