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Here is a sample from my wife's Cavalier. 75,000 total miles. It is driven quite hard daily. Analysis by Oil Analyzers (CTC Labs). Fe 64 Cr 3 Pb 1 Cu 23 Sb 0 Al 28 Ni 0 Ag 0 Si 13 Na 0 Mg 23 Ca 3316 Ba 0 P 1103 Zn 1428 Mo 6 Ti 0 V 0 K 0 Fuel Visc 15.51 cSt Water 0 Soot N/A Coolant No TBN 1.9...

Here is an analysis on a friend's Toyota. 19,000 mileas on oil. 39,000 on truck. Full flow filter changed after oil in service 10,000 miles. One quart of makeup oil added at filter change. No oil usage. Viscosity @ 100 F: 15.25 cSt Iron: 20 ppm Chromium: 1 ppm Lead: 12 ppm Copper: 12 ppm...

Here is my latest analysis of Amsoil 5W-30 Heavy Duty Diesel Oil after 15,000 miles in my modified Cummins 24 valve engine. The engine has been dynoed at 380HP/850ft-lb torque at the wheels, so it is hardly stock. I use Fleetguard Stratapore full flow filters and an Amsoil bypass filter...