I posted this earlier in this thread but here it is again for anyone interested...
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The higher lead content I attribute to the cheap Chinese oil cooler I installed. It is a plate and fin style cooler and my guess is they probably soldered it together with lead since China doesn't have all the EPA regulations like we do over hear..I figure it may be leaching into the oil... but that is just a guess.
Since this was my first UOA I don't have any reports from before the install of the cooler to compare it to.
The TBN report shows that the additives package in the oil was still good so I could have gone further with mileage. It was a 3.0... they recommend changing the oil if it drops below 1.5 I believe.
Keep in mind when you compare my numbers to the "average" column on the right that the "average" mileage was 5,600 miles and mine is more than double that.