For 1990-2009 cars

Checks | Causes
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Excessive oil consumption (not due to leaks) is the use of 0.95 liters (1.0 qt) or more of engine oil within 2 414 kilometers (1,500 miles). The causes of excessive oil consumption may include the following conditions:
Preliminary |

• | External oil leaks

| Refer to oil leak diagnosis.

• | Incorrect oil level or improper reading of the oil level indicator

| After running the vehicle on a level surface for a few minutes, turn the engine off and for allow adequate drain down time (2-3 minutes) and check for the correct engine oil level.

• | Inspect for improper 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 severe usage

• | Crankcase ventilation system restrictions or malfunctioning components

• | Worn valve guides and/or valve stems

• | Worn or improperly installed valve stem oil seals

• | Piston rings broken, worn, not seated properly

| Allow adequate time for the rings to seat.

| Replace worn piston rings as necessary.

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