Engine Oil Consumption Diagnosis

OIL CONSUMPTION DIAGNOSIS
An engine that has excessive oil consumption uses 0.9L (11 quarts) of oil, or more, within 2,000 mi (3,200 km). The following list indicates the conditions and corrections of excessive oil consumption:
^ An improperly read oil level indicator (dipstick)
- Inspect the oil level while the car is parked on a level surface.
- Allow adequate drain-down time.
^ Improper oil viscosity
- Use the recommended SAE viscosity for prevailing temperatures.
- Refer to Specifications.
^ Continuous high-speed driving
^ Severe hauling, such as a trailer. This causes decreased oil mileage.
^ A malfunctioning crankcase ventilation system
^ External oil leaks
- Tighten the bolts, as needed.
- Replace the gaskets and seals, as needed.
^ Worn or omitted valve guides and/or valve stem seals
- Ream the guides.
- Install oversized service valves and/or new valve stem seals.
^ Broken or worn piston rings
^ Improperly installed or unseated piston rings
^ Improperly installed or improperly fitted piston
^ Plugged cylinder head gasket oil drain holes
^ Damaged intake gaskets