Saw a recent post on copper in oil and I had an unusual test result. At 13000 mi. and 5 oil changes with Mobil 1 0W40 copper came back at 49 ppm. I do not have the previous history on this car, purchased with 9400 mi. At 14200 I pulled a sample and sent it to Blackstone for a followup. The copper came back at 37. The other wear metals were fine. So with a fresh oil change in which I added 9.5 quarts to what ever residual oil might have been left with 49 ppm copper I get 37 ppm copper 1200 mi later. I've owned a number of Porsches in the past and the only time I have seen high copper it was 29 ppm on a 93 RSA and needed a rebuild. Thanks for your thoughts.