I took the car out on the highway just now to get it good and warmed up. From about 3-4k under heavy load I am getting diesel pinging like you would on an old 61x. It could be full of crud from running 80k+ miles with the previous injectors that were popping low. It is much more quiet at idle for sure and I do not notice the white/grey smoking after it sits idling for a while. Will be interesting to see if the mileage goes up.