At 31,500 on oil: Iron(Fe) 62 ppm, Chromium(Cr) 3 ppm, Lead(Pb) 5 ppm, Aluminum (Ai) 11 ppm.
At 45,300 on the oil: Iron(Fe) 68 ppm, Chromium(Cr) 3 ppm, Lead(Pb) 6 ppm, Aluminum (Ai) 10
At 54,800 on the oil: Iron(Fe) 52 ppm, Chromium(Cr) 2 ppm, Lead(Pb) 8 ppm, Aluminum (Ai) 11 ppm
Wayne, It's interesting to note the actual REDUCTION in several wear metals as you hit the 54K mile mark, as compared to the previous one at 45K. I'm falling into that same mileage period with my truck, and it will be interesting to see how my wear metals taper off in this engine. On my '91, wear was still dropping after 100K on the clock by small amounts.
Along these lines, are you seeing any analysis benefits from users of the new Donaldson/Amsoil full flow filters? I'll be sending a new sample off to Blackstone today - very interested to see if any significant reductions are evident from this sample with the Donaldson in use...