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Chevrolet Impala heavy oil consumption



  • My 2006 Impala SS purchased new by me started burning 3-4 quarts of oil between 6,000 mile oil changes as typically indicated by the cars computer before it even reached the 36,000 warranty expiration. Dealer has replaced the valve covers under warranty stating that a service bulletin stated the PCV valves which are built into the valve covers were allowing too much air flow in the engine and that the engine was pulling oil back in through the air intake. mechanic stated that this looked logical upon replacement of the valve covers due to the sludge he observed where the PCV valve feeds back into the air intake. Having now driven another 6,000 - 7,000 miles since the valve covers were replaced, total mileage now 46,000, the oil consumption has not improved. I will report the TSB reported in you previous posts relating to the nick in the valve guides and head replacement to see what the dealer tells me. Is there any new information you can provide me with, as the post I am replying to here is over 2 years old?

  • My 2006 Impala is using all the oil in the car at about 2.500 miles. No message stating the oil is low or to add oil. It just runs out.
    The local garage says they want to monitor the usage but I feel they are not telling the truth. If your message board is any indication of all the problems, then shouldn't Chev have a better answer by now? I drive my car about 100 miles a month (think little old lady) and only have 35,000 miles on it. I am told it is my driving or lack of driving which causes the problem. Don't believe it but I need more information.
  • I have a 2001 with 35451 mile on it with 3.8 Ido not use any oil. I use Mobil 1 5-30.
  • gmcustsvcgmcustsvc Posts: 4,055
    An oil consumption is the first test the dealer would need to do. Please keep me updated on your progress.
    GM Customer Service
  • Through constant checking on the oil levels, I have determined that the problem exists when I take the car on a trip which is longer than one hour at freeway speeds. The dealer is still tracking the usage but that is all. Since most of my driving is local, it took a while to locate the problem. It is not what I expected of a Chev.
    Thank you for your interest in my problem.
  • gmcustsvcgmcustsvc Posts: 4,055

    Please keep us posted on any information from the dealership.

    Thank you and have a great weekend!
    Caron, GM Customer Service
  • greyscotgreyscot Posts: 1
    I have an 06 ss with 41,000 on it now it has been driven mainly in town with occasional trips with no oil usage but now my wife started driving 45 miles each way 5 day's a week and it has started using oil like crazy,1.5 quarts in 3000 miles.I am taking to the dealer now this should come under the powertrain warranty?
  • That sounds identical to my problem. As long as we drive in town, there is no oil usage but on infrequent road trips, it will use one quart or more. The dealer has me driving an additional 2,000 miles and is checking the mileage and usage. He says he will then send a report to Chev. I am hearing things like a possible ring job but I don't know what that is. Although I have explained that the problem only appears on trips with highway speeds, they don't seem to get it. How can driving another 1,000 miles in our small town give them any more information. Good luck to you. Please keep me informed if you can. I would certainly appreciate it.
  • After checking the mileage every 1,000 miles for 5,000 miles, the dealer got the ok to do something. They said they found the seals were not tight on the intake and they are doing something about that today. Hope this is the end of the problem.
  • I have a 2006 Impala LS with the 3.5 V6 with 115000 miles on it. it doesnt burn or leak oil, BUT for some reason i use 3-4 quarts every 2000 miles. i was going to replace the pcv valve but its not equipped with one!! any ideas PLEASE!!! i went on a 400 mile trip this past weekend and used 2 quarts of oil .
  • I have the same car and had the same problem. The dealer just got the ok from GM to replace the intake valve and all the other seals around it at no cost to me as they determined that was the problem. My car has only 45,000 miles and didn't have such severe usage as you have but what they found was the usage increased the closer I got to the 3,000 miles without changing the oil. I was told the problem is fixed but will be watching it closely.
  • I have a 2008 50 Aniversary Impala that has the same problem I read about here. I noticed on long trips, I was using a great deal more oil than in city driving, once running nearly dry. My dealer now has me on the familair consumption test, but has already documented the heavy usage each time I return from a trip. I have even taken it to Chevy dealers in the distant city and document that they added a quart after a 350 mile trip. When asked, the dealer tells me they have never seen this problem in an Impala! From this message stream, I guess I'm not hearing the truth from them.
  • After I completed the consumption test, the dealer sent the information to Chev. The dealer replaced all the seals and gaskets stating that the cause was "leaking valve guilde seals. This work took several days but as they had given me a 2012 Chev to drive, it was not a problem for me.
    I also noticed that the consumption seemed to increase as I was getting nearer to the time for the oil change.
    One other item is that I kept the dealership informed about this website and my responses about their service.
    Good luck to you.
  • I'm still enduring the consumption test. Just was in for the scheduled oil change and continued to discuss this issue with the Dealer. They are still maintaining the company (GM) line that... "expected oil usage for this car is 1 quart every 2,000 miles". I find that totally unexceptable. I also shared the information from these postings, and he just shrugged off information from "blogs" or non-GM websites. I've also advised the dealer that it seems my lifelong loyalty toward GM might be at an end. And now I have to make another hi way trip where I'll be nearly out of oil by the time I reach my destination (350 miles) like the 3 trips before. Getting to know the GM dealers that as much as this one at home! This just doesn't sound like the image GM keeps trying to convince us they are. Pretty sad...
  • I also owned an 2006 Impala SS that consumed far to much oil. My gut feeling says the root cause is caused by the displacement on demand. Like everyone else, oil consumption was far heaver on the highway compared to city driving.

    While driving to Chicago from Indiana I notice an issue when the engine went from 4 cylinders to 8. I could only replicate this problem If I drove 65-70mph on 4 cylinders anywhere from 5-8 miles without engaging all eight cylinders. After the extended 4 cylinder mode driving I would gently press the gas to engage all 8 cylinders and a plum of smoke would exit the exhaust. I am not talking about a small amount of smoke either, It was a significant amount.

    The challenge is to keep your car from engaging all 8 cylinders for an extend period of time. A neighbor who owns a 2007 was able to replicate the exact same problem Has anyone also notice this problem?
  • The latest in this never-ending story is that the dealer added some dye to the oil, then after 500 miles, scoped the engine and under carriage with a black light. I'm still waiting to hear the results but this was supposed to prove the oil wasn't leaking somewhere. A total of 3 different GM dealers have checked every inch of the vehicle and could not find any leak. But anything they want to do to prove the problem is consumption rather than leaking, I'll endure. I just want the problem addressed and fixed. But they still seem extremely reluctant to admit any problem. There was even a factory letter GM published about the 8 cylinder Impala. Same problem but the letter doesn't address my 6-cyl Impala. I'll share the info the dealer offers me (if any); it looks like I'll have to call them because they haven't called me like they promised, and its been over a week. Customer service - what a crock.
  • After 5 - 6 months of the oil consumption test, and the dye, I had the "check engine" light come on, with a traction warning (while driving in a snow storm) so I had them look at that while doing the next oil consumption check. Several things were "discovered" -
    Steering Fluid gear leaking - replaced
    Tie Rod Ends loose - replaced
    Small Leak from Intake Gasket - replaced gasket
    Front Crank Seal leaking - replaced seal
    Trans Fluid leak - replaced trans line fitting

    Gasket replacement covered by factory warranty
    All else covered by extended warranty

    We will see if this solves the problems. I'll take it back in 500 miles for another oil consumption check. Does seem to be a lot of "problems" in a car only 4 years old and 51,000 miles! My trust in this car has been severely compromised. I see a trade in near future!
  • We have a 2006 Impala SS, we bought it new and it it using 1 qt every 1000 miles, told the dealer and there answer was it is acceptable to Chevy to use this amount of oil in this engine, GM wil do nothing about it, but I have owned Chevy all my life and am serously thinking about buying Kia or ford, I have been told that the oil is getting burned up in the catalytic converters and this is why you dont see the smoke , and there are no leaks anywhere, If someone has an answer as to how to remedy this with GM or what to do, I would really appreciate it,
  • My 2008 had the same problem (see earlier posts). Finally they agreed to replace gaskets where they claimed they found "small" oil leaks - this after 6 months of an oil consumption test. I don't have the invoice handy now to identify exactly what they did but I mentioned all the work done in an earlier post within the past week. If you can't find the post, let me know and I can reply again with more info. Dealer had told me the same thing - the GM line is that a quart per 1000 miles was "acceptable". I raised the roof because that wasn't acceptable to me at all. I have to believe they found it when they added a dye to the oil when they changed it once (part of the consumption test) then scoped it with a black light after 500 miles or something like that. It took another problem for them to fix both the oil issue and the other issue that came up - the gasket replacement was covered by factory warranty, and the rest by an extended warranty. Good luck ... I know what a hassle you are experiencing.
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