Quote:
Originally Posted by LarryBible
Don't get me wrong Brian, I admire your analytical and scientific nature about this, but if it were me, I would not use my own vehicle(s) as Guinea Pigs. There must be a better way to answer the question.
Actually, I consider 2% to be a high soot level. In the course of a reasonable OCI, only an engine in less than good condition would exceed this level.
My $0.02,
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Larry, I agree that 2% is definitely the upper limit. But, the SD has been running less than 1% on all of it's 5K changes. The makeup oil surely has an effect on this. We're quite conservative on the 5K changes with the synthetic oil, especially when makeup oil is necessary.