For 1990-2009 cars

Excessive oil consumption, not due to leaks, is the use of 0.9 L (1 qt) or greater of engine oil within 3 200 kilometers (2,000 miles). The causes of excessive oil consumption include the following conditions:

• | External oil leaks

| Tighten bolts and/or replace gaskets and oil seals as necessary.

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

| With the vehicle on a level surface, allow adequate drain down time and inspect for the correct oil level.

• | Improper oil viscosity

| Use recommended SAE viscosity for the prevailing temperatures.

• | Continuous high speed driving and/or severe usage

• | Crankcase ventilation system restrictions or malfunctioning components

• | Valve guides and/or valve stem oil seals worn, or the seal omitted

| Ream guides and install oversize service valves and/or new valve stem oil seals.

• | Piston rings broken, improperly installed, worn, or not seated properly

| Allow adequate time for rings to seat. Replace broken or worn rings, as necessary.

• | Piston improperly installed or mis-fitted.