All my numbers look good with the exception of Iron and Copper. There are a few reasons for the higher numbers, although the trend shows a drop in copper between changes. I need to investigate the Iron numbers. I should also note I am running Aeroshell 15W50 oil and some folks say that tends to produce higher copper numbers.
Most Common Sources of Wear Metal Elements in Oil:
- Iron - Cylinders, rotating shafts, valve train and any steel part sharing the oil.
- Copper- Brass or bronze parts, bushings, bearings, oil coolers, sacrificial coatings.
- Nickel - Valve guides, trace element in steel, some cylinder types.
- Chromium - Rings, cylinders, a trace element in steel.
- Silver - Sacrificial coatings, a trace element in some types of bearings, bearing cage plating
- Magnesium - Engine casings, additives
- Aluminum - Pistons, piston pin plugs, bearing overlay, casings.
- Lead - Primarily leaded gas blow-by, traces from bearings
- Silicon - Abrasive dirt from intake air, silicone sealers and gaskets, sample contamination.
- Tin - Bearings, bronze parts (with copper), anti-wear coatings.
I will continue to research the Iron numbers and discus the report with Roger at Cecil Aero, 08Romeo's real caretaker.