Preliminary
| The causes of above acceptable oil consumption may include the following conditions:
| • | Incorrect oil level or incorrect reading of the oil level indicator. |
| | With the vehicle on a level surface, run the engine for a few minutes, allow
adequate drain down time, 2 - 3 minutes, and check for the correct
engine oil level. |
| • | Incorrect oil viscosity. |
| | Refer to the vehicle owners manual
and use the recommended SAE grade and viscosity for the prevailing temperatures. |
| • | Continuous high speed driving and/or extreme usage. |
| • | Crankcase ventilation system restrictions or malfunctioning components. |
| • | Worn valve guides and/or valve stems. |
| • | Worn or incorrectly installed valve stem oil seals. |
| • | Piston rings broken, worn, or not seated correctly |
| | Allow adequate
time for the rings to seat. |
| | Replace worn piston rings as necessary. |
| • | Piston and rings incorrectly installed or not fitted to the cylinder bore. |
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