Ok, I just drained my sample of D1 and M1 mix at 5,500 miles. It was killing my HP and MPG. I just added 0w-20 and if smell has anthing to do with esters, then there are without a doubt much more esters in this 0w-20. Not only does my car feel better on this oil, it sounds better and will have much better MPG. HP is back up again and quite frankly feels much faster.