For 1990-2009 cars

Checks | Causes
--- | ---
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

• | 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