Gotta say the new Redline 0W40 is looking better every day for my BMW. I'm in the RX rinse phase with Shell Helix Ultra 5W40 (Pennzoil Platinum Euro 5w40), which is ester and PAO free. This engine has had Mobil 1 0W40 changed every 5,000 miles (8,000kms) during it's life (75,000kms). I didn't expect RX to do much but the results have made me seriously rethink going back to Mobil 1 0W40. Also BMW stealerships have just moved from Mobil 1 0W40 to Castrol Edge 0W40.