OIL
CONSUMPTION
A. REASONS:
1.
EXTERNAL OIL
LEAKS
2. FRONT OR REAR MAIN BEARING SEALS
3. WORN OR DAMAGED MAIN BEARINGS
4. WORN OR DAMAGED CONNECTING ROD BEARINGS
5. WORN OR DAMAGED CAMSHAFT BEARINGS
6. WORN CRANKSHAFT JOURNALS
7. TAPERED AND OUT-OF-ROUND CYLINDERS
8. DISTORTED CYLINDERS
9. CLOGGED “PCV” VALVE
10. HONING ABRASIVE
11. WORN RING GROOVES
12. CRACKED OR BROKEN RING LANDS
13. WORN VALVE STEMS AND GUIDES
14. BENT OR MISALIGNED CONNECTING RODS
15. WORN OR IMPROPERLY FIT WRIST PINS OR THE WRONG PINS
16. WRIST PINS FIT TOO TIGHTLY
17. CLOGGED OIL PASSAGES
18. UNEQUAL TIGHTENING OF MAIN BEARING BOLTS OR CONNECTING ROD BOLTS
19. UNEQUAL TIGHTENING OF CYLINDER HEAD BOLTS
20. DIRTY COOLING SYSTEMS
21. DIRTY OIL
22. TOO MUCH OIL IN CRANKCASE
23. INCORR ECT PISTON RINGS FOR TYPE OF ENGINE
24. HIGH ENGINE VACUUM
25. WORN TIMING GEARS OR CHAIN
26. PISTON RINGS FIT WITH TOO LITTLE END CLEARANCE
27. WORN OR BROKEN PISTON RINGS
28. PISTON RINGS STUCK IN GROOVES
29. LATE VALVE TIMING
30. OIL PRESSURE TOO HIGH
31. OIL VISCOSITY
32. PISTON SLAP
33. INTERNAL GASKET/ INTAKE BREACH
34. SPARK KNOCK
35. AFTER MARKET PERFORMANCE CHIPS AND MODIFICATION
36. LUGGING ENGINE
37. INAPPROPRIATE OPERATION OF OVERDRIVE
38. LEAKING TURBOCHARGER SEAL
39. RESTRICTED AIR INTAKE
40. FUEL DILUTION
2. FRONT OR REAR MAIN BEARING SEALS
3. WORN OR DAMAGED MAIN BEARINGS
4. WORN OR DAMAGED CONNECTING ROD BEARINGS
5. WORN OR DAMAGED CAMSHAFT BEARINGS
6. WORN CRANKSHAFT JOURNALS
7. TAPERED AND OUT-OF-ROUND CYLINDERS
8. DISTORTED CYLINDERS
9. CLOGGED “PCV” VALVE
10. HONING ABRASIVE
11. WORN RING GROOVES
12. CRACKED OR BROKEN RING LANDS
13. WORN VALVE STEMS AND GUIDES
14. BENT OR MISALIGNED CONNECTING RODS
15. WORN OR IMPROPERLY FIT WRIST PINS OR THE WRONG PINS
16. WRIST PINS FIT TOO TIGHTLY
17. CLOGGED OIL PASSAGES
18. UNEQUAL TIGHTENING OF MAIN BEARING BOLTS OR CONNECTING ROD BOLTS
19. UNEQUAL TIGHTENING OF CYLINDER HEAD BOLTS
20. DIRTY COOLING SYSTEMS
21. DIRTY OIL
22. TOO MUCH OIL IN CRANKCASE
23. INCORR ECT PISTON RINGS FOR TYPE OF ENGINE
24. HIGH ENGINE VACUUM
25. WORN TIMING GEARS OR CHAIN
26. PISTON RINGS FIT WITH TOO LITTLE END CLEARANCE
27. WORN OR BROKEN PISTON RINGS
28. PISTON RINGS STUCK IN GROOVES
29. LATE VALVE TIMING
30. OIL PRESSURE TOO HIGH
31. OIL VISCOSITY
32. PISTON SLAP
33. INTERNAL GASKET/ INTAKE BREACH
34. SPARK KNOCK
35. AFTER MARKET PERFORMANCE CHIPS AND MODIFICATION
36. LUGGING ENGINE
37. INAPPROPRIATE OPERATION OF OVERDRIVE
38. LEAKING TURBOCHARGER SEAL
39. RESTRICTED AIR INTAKE
40. FUEL DILUTION
B. OTHER REASONS:
- LOW FLASH POINT OIL
- ENGINE HEAT
- ENGINE REPAIR
- OIL ADDITION
- OIL CHANGE
