My OM642 Mercedes 3.0L uses Shell Rotella 5w40. I switched when Mobil 1 quit producing ESP in the 5w40 weight. I've been doing this for about 64,000 miles and my DPF and remaining emission system components are holding up fine. Not sure if it is the Rotella or the fact that my DPF is hanging on the wall in my garage that is responsible for its longevity.