I accidentally used Pennzoil Ultra 5W-30 Euro L Formula which is designed for diesel engines in my last oil change. My car is an '09 Nissan 370Z with the VQ37 engine and now has a little over 50K miles. I have been doing 5K OCI's since new, previously using Pennz Ultra and Redline 5W-30 synthetic and Mobil 1 filters. My oil consumption has dropped from between 1.25-1.5 quarts between changes to between 1/3 and 1/2 quarts, not sure if it was the Ultra or the engine just settling down at around the 35K mark. From this report, it sure looks like Ultra doesn't use much moly, and all the other elements look good. So does the viscosity although the regular Ultra used between 35K-40K mileage held up better. Too bad the regular Ultra is no longer available. Looks like I will be switching back to Redline at the next change since my last stash of Ultra (non-Euro L) is in the crankcase now.