Chevrolet Excessive Oil Consumption

There are over 225 complaints on related to excessive oil consumption from Chevrolet engines.

Many owners of Suburbans, Avalanches, Prizms, Silverados, Tahoes and Aveos are claiming they need a new quart of oil every 1000-1500 miles without any visible leaks. In addition owners are claiming their vehicles feel like they're driving through mud, or being bogged down.

Burning the Midnight Engine Oil

Below is a partial list of vehicles with oil consumption problems as reported by their drivers on As you can see, this is not isolated to a single year or make, although it does seem to affect larger 2007 models more than most.

Make Model Years
Chevrolet Avalanche 2007
Chevrolet Aveo 2005
Chevrolet Impala 2008
Chevrolet Prizm 2000, 2001, 2002
Chevrolet Silverado 2003, 2007
Chevrolet Suburban 2007, 2008, 2009
Chevrolet Tahoe 2007

About Oil Consumption

All engines require oil to lubricate and protect the moving parts of an engine from wear. These parts include cylinder walls, pistons and piston rings. When a piston moves down its cylinder, it leaves a thin film of oil on the cylinder wall. This tiny amount of oil partially gets consumed by the combustion process and therefore it's normal to see a small amount of oil reduction is the engine.

What's not normal, however, is to see the rapid and extreme oil consumption of some Chevrolet engines.

What Causes Chevrolet's Oil Problem?

According to a Chevrolet service bulletin, the most common cause is stuck oil control rings. Generally the stuck oil control rings are the result of excessive oil on the cylinder walls and this excessive oil can come from the PCV system and/or the AFM pressure relief valve in the oil pan.

Upon inspection of an engine experiencing this problem, you will typically see an oil-fouled spark plug. Although excessive oil may also show up in the intake manifold.

Actions You Can Take

This step is crucial, don't just complain on forums! The sites below will actively manage your complaints and turn them into useful statistics. Both and the CAS will report dangerous trends to the authorities and are often called upon by law firms for help with Class Action lawsuits. Make sure to file your complaint on all three sites, we can't stress that enough.

  1. Step 1: File Your Complaint at is a free site dedicated to uncovering problem trends and informing owners about potential issues with their cars. Major class action law firms use this data when researching cases. Add a Complaint

  2. Step 2: Notify the Center for Auto Safety

    The Center for Auto Safety (CAS) is a pro-consumer organization that researches auto safety issues & often compels the US government to do the right thing through lobbying & lawsuits. Notify the CAS

  3. Step 3: Report a Safety Concern to NHTSA

    The National Highway Traffic Safety Administration (NHTSA) is the US agency with the authority to conduct vehicle defect investigations & force recalls. Their focus is on safety-related issues. Report to NHTSA

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Chevrolet Customer Assistance Center

P.O. Box 33170 Detroit MI 48232-5170