For 1990-2009 cars

Cause | Correction
--- | ---
Worn valves, valve guides and/or valve stem oil seals |

• | Inspect the spark plugs for oil deposits. Refer to Spark Plug Inspection .

• | Repair or replace as required.

Worn Piston Rings Oil consumption may or may not cause the engine to misfire. |

• | Inspect the spark plugs for oil deposits. Refer to Spark Plug Inspection .

• | Inspect the cylinders for a loss of compression. Refer to Engine Compression Test .

• | Perform cylinder leak down and compression testing to determine the cause.

• | Repair or replace as required.