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OK I need some help, I have a 2005 Chevy Cobalt with the 2,2L. I recently did an oil change 3 weeks ago and have been keeping an eye on the oil and i checked it the other day and noticed it was low yet again. So i changed the oil again after i noticed that and there was only 3.5 quarts of oil in the car. Has anyone else had this issue? and if so what did you do to fix the problem. I should of stated earlier the car has 150,000 miles on it all highway miles its a 70 mile round trip to work everyday. Any help or ideas would be greatly appreciated.
 

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No I have not noticed any sign of smoke and not really any signs of any leaks that I can tell

Sent from my SCH-I500 using AutoGuide.com App
 

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Check for leaks! (Oil pan, drain plug, oil pressure switch and valve covers)
Always check the oil before you start it on a level surface !
Lastly did you measure how much oil exactly was left in it after draining?
How much does it hold full (4.7 liters I assume).

It would not be out of the ordinary to need to add one liter after 3000 miles on a car with that many miles. That said there are oil treatments you can buy that will clean sticky piston rings if this your case.
 

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I see that you're having some concerns about the oil levels in your vehicle.The accepted rate of oil consumption for passenger cars is 0.946 liter (1 qt) in 3200 km (2000 mi).

Your dealership can look into the rate of oil consumption of your vehicle to see if it is beyond the accepted rate, if you like. Please let me know if you decide to go this route!

Sarah
GM Customer Service
 

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Also check you plastic oil filter cap. Ive heard of them being over tourqed, cracking and leaking. Oil pools up on the block behind the filter, and not much makes it to the ground. Making detection harder. But coby is right. Engines with that many miles tend to use up oil due to normal wear. Gl, hope its something minor.
 

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I see that you're having some concerns about the oil levels in your vehicle.The accepted rate of oil consumption for passenger cars is 0.946 liter (1 qt) in 3200 km (2000 mi).

Your dealership can look into the rate of oil consumption of your vehicle to see if it is beyond the accepted rate, if you like. Please let me know if you decide to go this route!

Sarah
GM Customer Service
That seems like a lot....I just did an oil change on mine. Did not add oil since last oil change and it was only down 600 milliliters over 11000Kms. Mind you there's only 41000Kms on the car.
 

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600ml over 11000Kms seems reasonable to me. Cleaned it out pretty much because it took 4.7 liters to bring it to full mark. Most people here say they need to add a quart at about 5000Kms or so, I think I'm good.

Look at ChevyCustSvc 's reply up top. According to her 3 and half liters would have been considered normal over 11000Kms.
 

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Guess I just got a good engine the because at 5000 miles I'm down maybe 1/4 quart if that. and I have 57000 on the odometer.
 

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Well thats 250ml at 8000Kms your not that far off. Probably warmer where you are too. Maybe you do more highway miles than my daughters riding into town to university.
 
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