I am trying to interpret UOA's. I get info through others comments but like most newbies I don't know alot and get confused by certain elements etc. So I typed this up for all to print out and have next to them for guidance. To be added/edited as we all see fit.
Mods please move if this is inappropriate for this particular forum.
WEAR METAL SOURCES
IRON……….CYLINDERS, GEARS, RINGS, CRANKSHAFTS, LINERS, BEARINGS, HOUSINGS, RODS, and PLATINGS
CHROMIUM……………..RINGS,ROLLER/TAPER BEARINGS, RODS, PLATINGS
LEAD……….BEARING OVERLAYS, ADDITIVES IN GEAR OIL AND GASOLINE
COPPER…………………BUSHINGS, BEARINGS, THRUST WASHERS, FRICITION PLATES, OIL COOLERS, ADDITIVE IN OIL
TIN………………………………….BEARINGS, BUSHINGS, PISTONS, PLATINGS
ALUMINUM………PISTONS, BEARINGS, PUMPS, BLOWERS, ROTORS, THRUST WASHERS
NICKEL……………………………………………………………………VALVES
SILVER………………………………………….BEARINGS,BUSHINGS,PLATING
MANGANESE……….TRACE ELEMENTS IN LINERS AND RINGS, ADDITIVE IN GASLOLINE.
TITANIUM……………………………………………………….TRACE ELEMENT
VANADIUM……………………………………………………..TRACE ELEMENT
CONTANIMENTS & SOURCES
SILICON…………………………………….ELEMENT USED TO DETERMINE THE LEVEL OF AIRBORNE DIRT AND ABRASIVES IN THE OIL.(SOMETIMES USED AS AN ANTI-FOAM AGENT)
BORON………………………….PRESENT IN MOST PERMANENT ANTI-FREEZE SYSTEMS AND COOLING SYSTEMS INHIBITORS (SOMETIMES USED AS AN ADDITIVE)
SODIUM………………………………….PRESENT IN MOST PERMANENT ANTI-FREEZE SYSTEMS AND COOLING SYSTEM INHIBITORS (SOMETIMES USED AS AN ADDITIVE)
POTASSIUM………….PRESENT IN MOST PERMANENT ANTI-FREEZE SYSTEMS AND COOLING SYSTEM INHIBITORS (SOMETIMES USED AS AN ADDITIVE IN GEAR OIL)
ADDITIVES AND THEIR FUNCTION
MAGNESIUM……………………….DISPERSENT/DETERGENT ADDITIVE
CALCIUM………………………….. DISPERSENT/DETERGENT ADDITIVE
BARIUM………………………….. DISPERSENT/DETERGENT ADDITIVE.
PHOSPHORUS…………………………………..….ANTI-WEAR ADDITIVE
ZINC……………………………………………….…. ANTI-WEAR ADDITIVE
MOLBDENUM………………………………….…… ANTI-WEAR ADDITIVE
FUEL DILUTION = UNBURNED FUEL IN THE OIL MAY SIGNAL FUEL SYSTEM LEAKS OR INCOMPLETE COMBUSTION.
FUEL SOOT = A RESULT IN INCOMPLETE COMBUSTION OR BLOW-BY. HIGH DRAIN LEVELS AMY INDICATES COMBUSTION PROBLEMS OR OVEREXTENDED DRAIN INTERVALS.
VISCOSITY = THE KINEMATIC VISCOSITY DETERMINED AT 40°C AND/OR 100°C IS A MEASURE OF THE FLOW RATE OF AN OIL IN RELATION TO TIME. THIS DATA IS USED TO ASSIGN AN SAE GRADE TO OIL.
SAE GRADE…………….MIN-cST-100°………………MAX-Cst
10w……………………4.10………………………….xx
20w………………………..5.60……………………….9.29
30w…………………………9.30……………………..…12.49
40w……………………….12.50……………………………16.29
50w………………………..16.30………………………………21.89
Mods please move if this is inappropriate for this particular forum.
WEAR METAL SOURCES
IRON……….CYLINDERS, GEARS, RINGS, CRANKSHAFTS, LINERS, BEARINGS, HOUSINGS, RODS, and PLATINGS
CHROMIUM……………..RINGS,ROLLER/TAPER BEARINGS, RODS, PLATINGS
LEAD……….BEARING OVERLAYS, ADDITIVES IN GEAR OIL AND GASOLINE
COPPER…………………BUSHINGS, BEARINGS, THRUST WASHERS, FRICITION PLATES, OIL COOLERS, ADDITIVE IN OIL
TIN………………………………….BEARINGS, BUSHINGS, PISTONS, PLATINGS
ALUMINUM………PISTONS, BEARINGS, PUMPS, BLOWERS, ROTORS, THRUST WASHERS
NICKEL……………………………………………………………………VALVES
SILVER………………………………………….BEARINGS,BUSHINGS,PLATING
MANGANESE……….TRACE ELEMENTS IN LINERS AND RINGS, ADDITIVE IN GASLOLINE.
TITANIUM……………………………………………………….TRACE ELEMENT
VANADIUM……………………………………………………..TRACE ELEMENT
CONTANIMENTS & SOURCES
SILICON…………………………………….ELEMENT USED TO DETERMINE THE LEVEL OF AIRBORNE DIRT AND ABRASIVES IN THE OIL.(SOMETIMES USED AS AN ANTI-FOAM AGENT)
BORON………………………….PRESENT IN MOST PERMANENT ANTI-FREEZE SYSTEMS AND COOLING SYSTEMS INHIBITORS (SOMETIMES USED AS AN ADDITIVE)
SODIUM………………………………….PRESENT IN MOST PERMANENT ANTI-FREEZE SYSTEMS AND COOLING SYSTEM INHIBITORS (SOMETIMES USED AS AN ADDITIVE)
POTASSIUM………….PRESENT IN MOST PERMANENT ANTI-FREEZE SYSTEMS AND COOLING SYSTEM INHIBITORS (SOMETIMES USED AS AN ADDITIVE IN GEAR OIL)
ADDITIVES AND THEIR FUNCTION
MAGNESIUM……………………….DISPERSENT/DETERGENT ADDITIVE
CALCIUM………………………….. DISPERSENT/DETERGENT ADDITIVE
BARIUM………………………….. DISPERSENT/DETERGENT ADDITIVE.
PHOSPHORUS…………………………………..….ANTI-WEAR ADDITIVE
ZINC……………………………………………….…. ANTI-WEAR ADDITIVE
MOLBDENUM………………………………….…… ANTI-WEAR ADDITIVE
FUEL DILUTION = UNBURNED FUEL IN THE OIL MAY SIGNAL FUEL SYSTEM LEAKS OR INCOMPLETE COMBUSTION.
FUEL SOOT = A RESULT IN INCOMPLETE COMBUSTION OR BLOW-BY. HIGH DRAIN LEVELS AMY INDICATES COMBUSTION PROBLEMS OR OVEREXTENDED DRAIN INTERVALS.
VISCOSITY = THE KINEMATIC VISCOSITY DETERMINED AT 40°C AND/OR 100°C IS A MEASURE OF THE FLOW RATE OF AN OIL IN RELATION TO TIME. THIS DATA IS USED TO ASSIGN AN SAE GRADE TO OIL.
SAE GRADE…………….MIN-cST-100°………………MAX-Cst
10w……………………4.10………………………….xx
20w………………………..5.60……………………….9.29
30w…………………………9.30……………………..…12.49
40w……………………….12.50……………………………16.29
50w………………………..16.30………………………………21.89