Originally Posted By: Danh
Originally Posted By: Eddie
What do the wear values of Iron, Chrome and Aluminum yield? We're really only interested in wear values and THEN dilution IF there is a problem. We seem to get the sequence backwards sometimes. ed
Yes, there's the conundrum: wear metals are good. Last UOA, which was admittedly short, 2,400 mile highway run, showed 4ppm of iron, 1 ppm of aluminum and no other wear metals. I guess it depends which side of the UOA argument you're on: if it's that a UOA is to determine the condition of the oil, it's a "fail "; if it's that a UOA determines the condition of the engine, it's a "pass".
Either way, it does suggest nothing horrible is going on inside the engine. But if I followed the oil life monitor and extended the OCI to 12,000 miles I suspect results would be really different.
O.K. you wear is good so you know you don't have to extract at 2,400. Try a 4,000 uoa to check wear and increase the uoa/oci until you reach your extraction point/safe oci. Use that oci and forget the uoas.
Originally Posted By: Eddie
What do the wear values of Iron, Chrome and Aluminum yield? We're really only interested in wear values and THEN dilution IF there is a problem. We seem to get the sequence backwards sometimes. ed
Yes, there's the conundrum: wear metals are good. Last UOA, which was admittedly short, 2,400 mile highway run, showed 4ppm of iron, 1 ppm of aluminum and no other wear metals. I guess it depends which side of the UOA argument you're on: if it's that a UOA is to determine the condition of the oil, it's a "fail "; if it's that a UOA determines the condition of the engine, it's a "pass".
Either way, it does suggest nothing horrible is going on inside the engine. But if I followed the oil life monitor and extended the OCI to 12,000 miles I suspect results would be really different.
O.K. you wear is good so you know you don't have to extract at 2,400. Try a 4,000 uoa to check wear and increase the uoa/oci until you reach your extraction point/safe oci. Use that oci and forget the uoas.
