Oil Consumption Diagnosis
Excessive oil consumption, not due to leaks, is the use of 0.6 L (0.7 qt) or greater of engine oil within 1000 kilometres (621 miles). The causes of excessive oil consumption include the following conditions:
| | 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. |
| | 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 |
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