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'06 Raven V [SOLD]
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Discussion Starter #1
I've searched, cant find any related info or I'm just not looking in the right area (also checked the FAQ). Need some friendly advice though becuase I just dont trust the stealership. (apologize if this is a dup. post) I have found TSB info on a possible PCV related issue on other GM motors, no mention of LS2 however.

Questions is, has anyone experienced consumption in the range of 2.5 quarts in a matter of 1000 miles over two months under normal driving conditions (not driven hard either) - that being to and from work & weekend driving (about 12 miles r/t per day and the occasional day trip within that time frame & mileage)

12 miles per day avg X 30 days per month = 360 miles
360 miles X 2 months = 720 miles
720 miles + 280 (miles for joy riding etc)
1000

Ok, so I can see maybe a quart being used here but not close to 3. I think the comsumption standards are around 1qt per 1000-2000 miles?

I'm thinking a possible PCV related issue? I just dont want it to get to the point where I have to replace bearings, etc in the bottom end. It just doesnt make any sense to me.

:hmm:

Any thoughts on the matter would greatly be appreciated...



 

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2006 CTS-V
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1,415 Posts
Mine burns a little oil. Started doing it around 35k when I switched to Royal Purple (oil pry had nothing to do with it) but I'm not sucking down that much. Maybe 1 - 1.5 quarts between oil changes tops. I thought about doing a catch can to see how much was getting "recycled" in through my intake but have not gotten around to it yet... mainly because I know my intake is pry already coated with oil from the last 40k miles w/o a catch can......and then how much would it help if it's already all coated right?

not sure if this post helped anything... but at least you know you are not totally alone.
 

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2006 CTS-V
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1,415 Posts
Oh if it helps any I drive about 50 miles a day just back and forth to work... so I'm hitting 1000 miles a lot sooner than you are.
 

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'06 Raven V [SOLD]
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Discussion Starter #4
Oh if it helps any I drive about 50 miles a day just back and forth to work... so I'm hitting 1000 miles a lot sooner than you are.

Thx, yeah, any info helps. I thought about the catch-can too, just to see whats being cycled back. Might do that.

Forgot to mention that it has just under 28k on it...
 

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2016 ATS Premium 6-spd MT
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14,006 Posts
Dang! 1 to 1.5 qts each 1k miles is way too much. If it's not dripping (in your case, running) out the bottom of the pan or a main seal, the most obvious places pretty much narrows down to valve guides or rings. I've heard that if take the compression of each cylinder, record it, take out each sparkplug and squirt just a bit of oil into the cylinder, and take a compression reading again, a change in that reading would indicate the rings in that/those cylinder(s) are bad. Otherwise, the culprit would probably be the valve guides. Not sure just how accurate/reliable the method is, however.

Good luck with this. Stay in touch and let us know what you do and find out.
 

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2005 CTS-V
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8,363 Posts
The information in Service Manual can be summarized as follows:

Excess oil consumption has three basic causes:

The oil is leaking from the drain plug, the filter, gaskets, or seals. This is diagnosed with visual inspection of the valve rocker arm cover, the oil pan, front engine cover, and other sealing areas for leaks just after sufficient operation to bring fluids up to operating temperature. Detecting leaks can be aided by cleaning prior to operation or the application of aerosol powder or baby powder during operation.

The oil is being consumed through the intake. This usually shows up in the form of oil accumulation within the intake manifold. Inspection should also verify vacuum at the positive crankcase ventilation (PCV) dirty air hose where it connects to the vacuum orifice tube in the engine valley cover. If oil has accumulated in the intake inspect for: (a) plugged vacuum orifice tube in the engine valley cover; (b) plugged or restricted, or leaking PCV dirty air hose; (c) clogged or restricted intake manifold passage; (d) excessive crankcase pressure or blow-by; or (e) plugged or restricted PCV fresh air hose.

The motor is consuming it because of internal conditions such as worn or unseated rings, worn valve guides, and the like. Most of these conditions will show up on a compression test. This tends to a be the problem for either: (a) relatively new motors that are not properly assembled or not properly broken in; or (b) relatively old engines for which wear has accumulated.
 

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04 CTS-V with a little hp persuasion device
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3,824 Posts
Damn truck motors. About the only thing they're good for is pullin stumps and burnin oil!


J/K
 

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2012 CTS-V Sedan, 2011 CTS Coupe, 2010 Ford Raptor
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3,547 Posts
Have you checked the tow hitch? I had the same thing, turned out to be oil leaking from where the tow ball and hitch connect.
 

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05 CTS-V raven black
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Have you checked the tow hitch? I had the same thing, turned out to be oil leaking from where the tow ball and hitch connect.
I've heard of that, the oil leaked all over the 7 wire trailer connection and caused all kinds of electrical problems
 

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'06 Raven V [SOLD]
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333 Posts
Discussion Starter #11
Really appreciate the input fellas. I did read the Kadonny post. I may pull a couple spark plugs tonight and see what I find...for peace of mind, its on the agenda for this evening.
:drink2:




Strange thing is (and I didnt elaborate on this earlier, but the event below prompted me to watch my oil consumption in the V)...my parents recently had their 06 GMC Envoy Denali 5.3 in to dealer service (check engine light came on) turns out it was 3 qts low on oil! No other visual signs or noise before the light came on. Damage had occured and this was at about the mid-point between oil changes (@2600 miles since previous change with 42,XXX on the ODO) Turns out the crank bearings were shot and the valve guides/rings were toast and valves were damaged. The vehicle was just outside warranty mileage-wise (3/36k). Long story sorta short, the dealership ended up good-faithing the repairs to the tune of $6500. You would think that a new engine would be the cheaper route, the dealer rebuilt it.

I plan to visit the same dealership if necessary, they seem to really be top notch.

Thanks again and a good weekend to all--
 

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78 Deville 10 CTS-V Sedan M6 10 SRX Turbo Premium
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252 Posts
Not trying to stir anything up, but in my 2006 Trailblazer SS it mentioned in the owner’s manual that under spirited or aggressive driving to keep an eye on the oil level, stating that it was normal for this particular engine to use oil. This applied only to the SS model. Are you a spirited driver? Hold gears? This may be the cause.
 

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2005 CTS-V
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8,363 Posts
Not trying to stir anything up, but in my 2006 Trailblazer SS it mentioned in the owner’s manual that under spirited or aggressive driving to keep an eye on the oil level, stating that it was normal for this particular engine to use oil. This applied only to the SS model. Are you a spirited driver? Hold gears? This may be the cause.
So its like a two stroke?
 

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1,661 Posts
It is normal for these "Truck" engines to burn oil. There is a rate that is considered "Excessive" as opposed to "Normal"
.5 qt every 3500 is normal, what the fellow mention above is not.

I don't know the fix. They know of the problem and are working on the fix, whatever that may be, and they expect it to be done the month of June.
 

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06CTS-V BOLT-ON,06JEEP TJ BUILT, 91 350SDL turbo(daily)
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967 Posts
my V burns oil to :( dam i just thought it was because i beat the shit out of it.
 

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'06 Raven V [SOLD]
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Discussion Starter #18
Well, no excessive oil on the plugs. Looked dry, no build-up. Two front on each side...so 1 and 5? Checked for leaks just to be sure. Nothing. I'm good about checking for leaks. I have a light colored concrete garage floor thats spotless, I'd notice it. Nothing in the front but I've had the diff seal replaced ooooh 4 times now. The concrete back there is a little darker though, riiiight under the diff from leaky.........not going there though.:helpless: Dont get me wrong, I love my V, I'm not complaining.

Hell if I know. I'll continue to monitor things.

I do drive the car in a spirited manner from time to time, nothing outrageous. I dont 'beat' on it. I dont redline it and have never tapped the rev limiter but usually wind it out to about 6k thru the gears. It's a sports sedan with a vette (uh, truck) motor...it was built to be driven*.
 

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2005 CTS-V
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Well it sounds like you have eliminated the really bad possibilities (internal wear, leaks) so it probably involves the amount of oil going through the intake. If this is what is happending it won't permanently damage the engine.

I don't know what climate you are in but you might want to try a different oil. I run 10w-30 here in Houston because it never gets cold, the higher viscosity runs a little cooler and offsets some fuel dilution. (Some brands are less prone to evaporating in the crankcase [Noack Volatility] but I don't want to turn this thread into oil brand thread).
 

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10-30 seems like the simplest solution. Consumption is way high. I hold gears, blip the throttle before down shifts, pull at least one stump a month and never add oil between 5000 mile changes @ 57,000 miles.
 
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