This is my 2nd UOA on this car and I am puzzled as to where the copper is coming from other than Blackstone's suggestions. Could it be a fuel additive? Vehicle runs like a top and I frequently drive from Lafayette to New Orleans and back (260+ round trip) so I put miles on fast. I use MMO in the gas, at least a 32oz bottle between OCIs. My other idea was leeching of the sealant used when I had the timing chain done over a year ago, they took off vavlecover/front chain cover. Other than the copper I am pleased with the results. I used 4 qts 20w50 and 2 10w30 platinum SN+.
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