Oil Consumption Diagnosis

Oil Consumption Diagnosis

Excessive oil consumption, not due to leaks, is the use of 0.9 L (1 qt) or greater of engine oil within 3 200 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