Quote:
Originally Posted by Brian Carlton
That is the fundamental question. If it remains in suspension and doesn't clump, can it cause any wear in the engine?
We all figure that soot is abrasive, but, there's no proof that the size of the particles can have an ill effect if they don't clump together.
One of these days I might run the Rotella syn to 8K or so and see how high the iron levels will rise. Is it proportional to mileage, or disproportional? That would be the only way to determine if additional soot levels cause increased wear.
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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,