Oil Consumption Diagnosis

Oil Consumption Diagnosis
An engine that has excessive oil consumption uses 0.9 L (1 qt.) of oil, or more, within 3,200 km (2,000 ml.). 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.
- 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