Oil Consumption Diagnosis

Excessive oil consumption, not due to leaks, is the use of 0.9L (1qt) or greater of engine oil within 3200 kilometers (2,000 miles). The causes of excessive oil consumption include the following conditions:

• External oil leaks

  Tighten bolts and/or replace gaskets and oil seals as necessary.

• Incorrect oil level or improper reading of oil level indicator

  With the vehicle on a level surface, allow adequate drain down time and inspect for the correct oil level.

• Improper oil viscosity

  Use recommended SAE viscosity for the prevailing temperatures.

• Continuous high speed driving and/or severe usage
• Crankcase ventilation system restrictions or malfunctioning components
• Valve guides and/or valve stem oil seals worn, or the seal omitted

  Ream guides and install oversize service valves and/or new valve stem oil seals.

• Piston rings broken, improperly installed, worn, or not seated properly

  Allow adequate time for rings to seat. Replace broken or worn rings, as necessary.

• Piston improperly installed or mis-fitted