Aluminum (Al) - Pistons, bearings, bushings, pump vanes, blower/turbos, washers, dirt, shims

Antimony (Sb) - Babbitt bearings, greases

Barium (Ba) - New oils (dispersant/detergent), grease, water

Boron (B)- New oils, coolant, seals, dust, fuel dilution

Cadmium (Cd) - Bearings, platings

Calcium (Ca)- New oils (dispersant/detergent/anti-acid), water, grease

Chromium (Cr) - Plated parts (primarily piston rings), coolant, anti-friction bearings, shafts, gears, seals, bearing cages, fuel leaks gas turbines

Cobalt (Co) - Bearings, turbine components

Copper (Cu) - Bearings, bearing cushions, bushings, thrust washers, valves, guides, injector shields, oil cooler tubes, wet clutches, coolant (copper radiator), gears

Iron (Fe) - Rings, crankshaft, cylinder walls, valve train, pistons, anti-friction bearings, gear train, shafts, clutch plates, washers, rust, water

Lead (Pb) - Babbitt or copper-lead bearings, platings, leaded gear lubes, leaded gasoline, grease, paint, seals, solder

Magnesium (Mg)- New oils (dispersant/detergent/anti-acid), bearings, superchargers, water

Manganese (Mn) - Steels, shafts, valves, corrosion, blowers (exhaust & intake systems)

Molybdenum (Mo) - New oils (anti-wear additives), piston rings

Nickel (Ni) - Shafts, valves, anti-friction bearings, gears, rings, turbine components

Phosphorous (P)- New oils (anti-wear additives), gears, coolant leaks.

Silicon (Si)- New oils (anti-foam, sand, dirt, dust, anti-freeze, gasket sealing compounds

Silver (Ag) - Anti-friction bearings, silver solder, wrist pin bushings, gear teeth, shafts

Sodium (Na)- Some new oils, coolant, salt water, grease

Tin (Sn) - Babbitt bearings, platings, solder, coolers, wrist pins, pistons, rings

Titanium (Ti) - Wear turbine engines, springs, valves, bearing hub, compressor discs, turbine blades

Vanadium (V) - By product heavy fuel oil, occasionally wear metal, turbine blades, valves

Zinc (Zn)- Anti-oxidant, anti-corrosive, anti-wear agent, bearings, platings, gears, seals, coolant leaks, grease.