Oil Consumption Diagnosis

Oil Consumption Diagnosis
An engine that has excessive oil consumption uses 0.9 Liters (1 quarts) of oil, or more, within 3 200 km (2,000 miles). 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 vehicle is parked on a level surface.
- Allow adequate drain-down time.
^ Improper oil viscosity
- Use the recommended SAE viscosity for prevailing temperatures.
- Refer to Maintenance Schedule (North American Emissions) for the proper oil viscosity specifications.
^ Continuous high-speed driving
^ Severe hauling, such as a trailer-may 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