Food for thought? Many have mentioned that on our UOA's thick oils show higher wear numbers. It is likely that this observation is correct; however, it does not necessarily follow that additional engine wear has occurred. The argument: We know that the wear metals we observe in UOAs have been suspended in the oil; however, other wear metal particles also went out the drain or were embedded in the oil filter. Therefore, what we may be observing is the thicker oil's ability to hold more wear particles in suspension. Is this possibly the case?