For 1990-2009 cars

Checks | Causes
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DEFINITION: Oil consumption (not due to leaks) above acceptable tolerances is the use of 1.9 L (2 qts) or more of engine oil within 3 200 km (2,000 mi). The causes of oil consumption above acceptable tolerances may include the following conditions:
Preliminary |

• | External oil leaks - Refer to Oil Leak Diagnosis.

• | Incorrect oil level or incorrect reading of the oil level indicator.

| Position 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, missing or incorrectly installed valve stem oil seals.

• | Piston rings not seated correctly.

| Allow adequate time for the rings to seat.

• | Piston rings broken or worn

• | Piston and rings incorrectly installed or miss-fitted to the cylinder bore