CTS High Oil Consumption

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Thread: CTS High Oil Consumption

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    CTS High Oil Consumption

    My 2005 CTS is using 2.5 qts. of oil in less than 2000 miles. Is anyone else having this problem, the dealership is giving me the run around about fixing the problem. Let me know if you have or had a simlar experience and what you did to resolve it. Yes the car was sold to me as "Certified" and it is not yet out of warranty. the dealership has acknowledged that at least.

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    Re: CTS High Oil Consumption

    That is REALLY bad... no leak?

    Even my NorthStar which are known for using oil isn't that bad
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    Re: CTS High Oil Consumption

    No leaks and the oil changes and service work has always been done at the local dealship. At the price of mobil 1 this engine should be like gold.

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    Re: CTS High Oil Consumption

    i have an 04 3.6 and it eats oil but not that bad.
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    Re: CTS High Oil Consumption

    So how did you get to talk to someone that can make a decission. All the dealership here is doing to saying 'We have to get approval from the factory rep." for the past two week. They will not give me his name and/or number, it is an obvious stall tatic.

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    Re: CTS High Oil Consumption

    Have you tried several wide open throttle runs? That's what they recommend as monthly preventive maintenance for Northstars to keep the rings from sticking. If the rings are bad, I'm not sure I'd try WOT.

    I forget what the policy is here about referring to other sites, but there's a cadillacforums (usual ending) for owners .
    Last edited by ral1960; 07-01-2009 at 09:38 PM.

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    Re: CTS High Oil Consumption

    How many miles on your car?


    I had a 2005 CTS with V6 for 4 years and don't remember using even one quart between changes.

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    Re: CTS High Oil Consumption

    I was told by a dealer that the STS Northstar V-8 models beginning with 2005 don't consume oil, since they use a different metal in the rings was the reason given. DTS Northstar V-8 models beginning with 2006 aren't supposed to consume oil. Salesman who owned an 2005 STS V-8 said it did not consume oil.

    About the V-6, haven't heard, but one would think they would have updated the V-6 beginning in 2006.

    If your're 2005 V-6 is consuming too much oil, best thing to do is trade-up for a newer model year.
    Last edited by CadillacAurora442; 07-18-2009 at 09:52 AM.
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    CTS High Oil Consumption - on low mileage 3.6L V6

    Quote Originally Posted by Tulsa Owner View Post
    My 2005 CTS is using 2.5 qts. of oil in less than 2000 miles. Is anyone else having this problem, the dealership is giving me the run around about fixing the problem. Let me know if you have or had a simlar experience and what you did to resolve it. Yes the car was sold to me as "Certified" and it is not yet out of warranty. the dealership has acknowledged that at least.
    So I purchased a 2005 CTS with the 3.6L V6 and the six speed manual about two years ago. At the time of purchase it had 37,000 miles on it. I now have 47,411 miles. I noticed early on that I was burning about 1.5 quarts every 2,000 miles. I took it into Ken Batchelor Cadillac here in San Antonio and they told me that was normal and just to make sure I changed it every 3,000 miles. Not satisfied with that answer I went to Cavender Cadillac here in San Antonio and they said that they have seen quite a few 3.6L V6 engines that consume high amounts of oil. They performed a carbon treatment on my engine and my oil consumption has been cut down to about 1.5 quarts every 3,000 miles. That still seems high to me - especially given the type of car we are talking about - but it is better.

    Like you I have had no leaks whatsoever.

    Now - one thing I have noticed is that I have to top off my coolant every 1,000 miles or so when I get the low coolant warning on the dash display. Also - I have no leak here either. Makes me wonder what type of leaks these 3.6L V6 engines have inside. For such a low mileage engine that just doesn't seem right.
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    Re: CTS High Oil Consumption

    I just found this information that is very helpful and might explain some of the high oil consumption on manual transmission CTS - as they are typically driven harder than others:

    #01-06-01-011F: Information on Engine Oil Consumption Guidelines - (Jan 13, 2009)

    Subject: Information on Engine Oil Consumption Guidelines

    Models: 2009 and Prior GM Passenger Cars and Gasoline-Powered Light Duty Trucks Under 8500 LB GVW (Including Saturn)

    --------------------------------------------------------------------------------
    This bulletin is being revised to update the warranty information on vehicles and add model years. Please discard Corporate Bulletin Number 01-06-01-011E (Section 06 -- Engine/Propulsion System).
    --------------------------------------------------------------------------------

    All engines require oil to lubricate and protect the load bearing and internal moving parts from wear including cylinder walls, pistons and piston rings. When a piston moves down its cylinder, a thin film of oil is left on the cylinder wall. During the power stroke, part of this oil layer is consumed in the combustion process. As a result, varying rates of oil consumption are accepted as normal in all engines.

    Oil Consumption
    The accepted rate of oil consumption for engines used in the vehicles referenced is 0.946 liter (1 qt) in 3200 km (2000 mi).

    Important: This rate only applies to personal use vehicles, under warranty, that are driven in a non-aggressive manner and maintained in accordance with the appropriate maintenance schedule, with less than 58,000 km (36,000 mi), or driven at legal speeds in an unloaded (for trucks) condition.

    Important: This rate does not apply to vehicles that are driven in an aggressive manner, at high RPM, high speeds, or in a loaded condition (for trucks). Oil consumption for vehicles driven under these conditions will be more.

    Many factors can affect a customer's concern with oil consumption. Driving habits and vehicle maintenance vary from owner to owner. Thoroughly evaluate each case before deciding whether the vehicle in question has abnormal engine oil consumption.

    Gasket and External Leaks
    Inspect the oil pan and engine covers for leakage due to over-tightened, damaged, or out of place gaskets. Inspect oil lines and fittings for signs of leakage.

    Improper Reading of the Oil Level Indicator (Dipstick)
    Verify that the dipstick tube is fully seated in the block. When checking the oil level, make sure the dipstick is wiped clean before taking an oil level reading and fully depress the dipstick until the shoulder bottoms out on the dipstick tube. The dipstick should be the proper part number for the engine/vehicle that is being checked.

    Notice: Operating your vehicle with an oil level that is below the minimum level indicated on the engine oil dipstick can result in severe engine damage. Repairs resulting from operating an engine with insufficient oil are not covered under the terms of the New Vehicle Warranty.

    Important: Refer to Owner Manual in SI for checking and adding engine oil.

    Not Waiting Long Enough After Running Engine to Check Oil Level
    Some engines require more time than others for the oil to drain back into the crankcase. To assure a sufficient amount of oil has drained back to the crankcase, and an accurate reading can be obtained, the vehicle should be allowed to sit for at least 15 minutes, after the engine has been shut off, before taking an oil level reading. In order to ensure accurate results, the temperature of the oil should be close to the same temperature as the last time the oil level was checked.

    Important: This does not apply to 2006-2009 Corvette Z06 equipped with the 7.0L LS7 and the 2009 Corvette ZR-1 with the 6.2L LS9 engines (dry sump). Follow the instructions in the Owner Manual for checking the oil in this application.

    Improper Oil Fill After an Oil Change
    Following an oil change, verify that the proper amount and type of oil was put in the engine and that the oil level on the dipstick is not above the full mark or below the add marks. Refer to the Owner Manual or Service Manual for information on recommended oil quantity, viscosity, and quality.

    Aggressive Driving, High Speed or High RPM Driving
    Aggressive driving and/or continuous driving at high speeds/high RPMs will increase oil consumption. Because this may not always be an everyday occurrence, it is hard to determine exactly how much the oil economy will be affected.

    A higher rate of oil consumption is normal for vehicles equipped with manual transmissions that are driven aggressively. By "aggressive," we mean operation at high RPM (3,000 RPM to redline), with frequent use of engine braking (using the engine to slow the vehicle). Vehicles that are driven aggressively may consume engine oil at a rate of up to 0.946 L (1 quart) every 805 km (500 mi). This is normal for a vehicle that is driven aggressively. No repair is necessary. This characteristic does, however, require the owner to check the engine oil level at sufficiently frequent intervals, especially when driving aggressively, to assure the oil level remains within the recommended operating range. As the Owner’s Manual recommends, you should check the oil level every time you get fuel.


    Towing or Heavy Usage
    Towing a trailer will increase oil consumption and may cause oil consumption to fall below the normal accepted rate referenced in this bulletin for an unloaded vehicle in a personal use application. Large frontal area trailers will further increase the work required from the engine, especially at highway speeds, and thus increases the rate of oil consumption.

    Crankcase Ventilation System
    Verify that the positive crankcase ventilation (PCV) system is operating properly. Blockages, restrictions, or damage to the PCV system can result in increased oil use.

    Oil Dilution (Fuel and Water)
    On vehicles that are usually driven short distances, less than 8 km (5 mi), especially in colder weather, unburned fuel and condensation generated from cold engine operation may not get hot enough to evaporate out of the oil. When this occurs, the dipstick may indicate that the oil level is over-full. Subsequent driving on a trip of sufficient length to enable normal engine operating temperature for 30 minutes or more, in order to vaporize excess moisture and fuel, may give the customer the impression of excessive oil consumption.

    Engine Temperature
    If an engine is run at overheated temperatures (see Owner's Manual or Service Manual) for more than brief periods, oil will oxidize at a faster than normal rate. In addition, gaskets may distort, piston rings may stick, and excessive wear may result. Verify that all cooling system components are in proper working order.

    Engine Wear
    Piston scuffing, excessive piston-to-wall clearance, tapered or out of round cylinders, worn, damaged or improperly installed valve guides, seals and piston rings will all cause an increase in oil consumption.

    Measurement of Oil Consumption
    Engines require a period of time to BREAK IN so that moving parts are properly seated. Therefore, oil economy should not be tested until the vehicle has accumulated at least 6400 km (4000 mi). An exception would be allowed only if an engine is reported to be using more than 0.946 liter (1 qt) in 1600 km (1000 mi).

    Verify that the engine has no external leaks. Repair as necessary.
    Verify that the engine is at normal operating temperature (see Owner's Manual or Service Manual).
    Park the vehicle on a level surface.
    Wait at least 15 minutes, after the engine is shut off, before checking the oil level to make sure that the oil has had time to drain back into the crankcase.
    Verify that the oil level is at, but not above, the full mark on the dipstick, and that the proper viscosity and quality oil are being used as recommended in the Owner's Manual.
    Record the vehicle mileage, date, and exact oil level on the form included in this bulletin.
    Ask the customer to verify the oil level, each time the vehicle is fueled, following steps 1-6 and return the vehicle to the dealership if the oil level is found at or below the add mark, 0.946 liter (1 qt) low. If the oil level remains above the add mark, the customer should continue to operate the vehicle and verify the engine oil level until 3200 km (2000 mi) has accumulated before returning to the dealership for a final evaluation.
    If the final evaluation shows that the engine uses more than 0.946 liter (1 qt) in 3200 km (2000 mi), follow the published symptom diagnostics as described in the appropriate Service Manual. If the oil consumption test shows that the engine uses less than 0.946 liter (1 qt) in 3200 km (2000 mi), explain to the customer that their engine meets the guidelines for oil consumption.

    Oil Economy Test -- Data Sheet

    Dealer Name: _________________________________

    Customer Name: _________________________________

    Phone: (___)____-_______ Phone: (___)____-_______

    VIN: ____________________________

    Oil Type Used: ____________________

    R.O. #: ___________________

    Step
    Date
    Mileage
    Oil Level
    Driving Conditions

    (City, Highway, Both)
    Last edited by boblutzfan; 09-16-2010 at 08:22 AM.
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    Re: CTS High Oil Consumption

    Quote Originally Posted by Tulsa Owner View Post
    My 2005 CTS is using 2.5 qts. of oil in less than 2000 miles. Is anyone else having this problem, the dealership is giving me the run around about fixing the problem. Let me know if you have or had a simlar experience and what you did to resolve it. Yes the car was sold to me as "Certified" and it is not yet out of warranty. the dealership has acknowledged that at least.
    Did not have that problem with my 03 sport.
    '13 Chrysler 300 AWD, '14 Expy EL,'09 Escape Hybrid and shopping for a sports car.
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    Re: CTS High Oil Consumption

    We have a soccer mom customer driving a 2006 SRX. It's been eating 2 litres plus between oil changes for awhile now. Dealer won't help. Luckily for her, the lease is up in two weeks.

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    Re: CTS High Oil Consumption

    i have a 2004 cts, 87,000miles, 3.6 liter. I am now experiencing a similar issue, MY car is eating synthetic oil. I am just monitoring it for now. I have absolutely no leaks. I might use a thicker oil. know some people that have swapped there cts engines with a chevy engine. Just monitor it and see how it goes, switch to a thicker oil

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    Re: CTS High Oil Consumption

    My CTS still is consuming oil. I like the way it drives specifically the RWD aspect of it. But this past six months of ownership have reminded me why I like buying new cars instead of used ones. Having to replace the drive shaft due to normal wear and tear on a manual transmission car ($2,000), the water pump, the persistent oil consumption and now the CD changer is dead. Not a happy camper considering this is a 2005 with only 50,000 miles on it!!!

    I bought it used with 37,000 miles two years ago - but fear it wasn't well taken care of. I think I will look to get a cheaper car and buy new rather than an expensive make and buy used. I have spent nearly $4,000 in maintenance/repairs over the past two years. If you add that to the $18,000 purchase price - it isn't that cheap. Plus - it sucks on gas mileage.

    I never thought I would say this - but I am seriously considering getting rid of the CTS and trading it in on a Verano T-Type next year. The thought of having a genuine luxury sport compact sedan with a powerful turbo motor and six speed manual has me really excited.

    Personally I think the Verano T-Type is the sleeper car of NAIAS. I want one....and the warranty that comes with it!
    My current ride - 2011 Honda Accord Coupe EX-L V6 with the six speed manual transmission

    My wife's current ride - 2011 Honda Odyssey EX-L Navigation.

    Previous Rides:
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    1996 Nissan 240SX SE - retired at 111K trouble free miles
    2004 Mazda6S - retired at 65K trouble free miles
    2005 Cadillac CTS - worst car ever owned - got rid of at 52K miles

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    Re: CTS High Oil Consumption

    Buick is really selling a car called "T-type" with a stick again?!

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