Quote:
Originally Posted by DeliveryValve
When you change oil often, you introduce an initial cleansing detergent. This detergent attacks and cleans out all contaminants from the previous fill. Though it does a great job of cleaning, the drawback is it also cleans off the existing additive bond and prevents the new additives from forming their bond to the moving parts until the detergent cycle is used up during the first 1000 or 2000 miles. This is why when doing an oil analysis, several UOA's has been posted in various forums show the engine oil's wear rate is actually higher at 3,000 miles, then it is at 7,500 mile and at 10,000 miles.
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That is exactly my point. The oil analysis appears to give a false indication of
when the wear is actually occurring. The increased dispersant capacity of the fresh oil is giving the impression of "new" wear, when, if fact, the wear particles are remnants of the previous oil cycle. The old oil was just not able to keep the wear particles in suspension.