Oil Consumption Diagnosis

Oil Consumption Diagnosis

An engine that has excessive oil consumption uses 1.9 L (2 qts) of oil, or more, within 3200 km (2,000 mi). The following conditions are indications of excessive oil consumption:
^ Improperly read oil level indicator (dipstick)
- Check the oil while the car is standing on a level surface.
- Allow adequate drain-down time.
^ Improper oil viscosity
- Use the recommended SAE viscosity for prevailing temperatures.
^ Continuous high-speed driving
^ Severe hauling, such as a trailer, causing decreased oil mileage
^ Malfunctioning crankcase ventilation system
^ External oil leaks
- Tighten the bolts, as necessary.
- Replace the gaskets and seals, as necessary.
^ Worn or omitted valve guides and/or valve stem seals
- Replace the valve stem seals.
- If the valve guides are worn, replace the cylinder head.
^ Broken, improperly installed, worn or unseated piston rings.
^ Piston improperly installed or improperly fitted.
^ Plugged cylinder head gasket oil drain holes