For 1990-2009 cars

Checks | Causes
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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

| 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.

• | 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, missing 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