Oil Consumption Diagnosis

Oil Consumption Diagnosis
An engine that has excessive oil consumption uses 0.9 L (1 qt) of oil, or more, within 2,414 km (1,500 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.
* 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 gasket