Corvette Z06 Oil Woes

Pennzoil motor oil
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Maybe if Corvette took their own advice and used 0W40, 15W50 or something half-way in between like 5W40 or 10W40, there wouldn't be a problem in the first place.

My Corvette one of these years, will be a 6.2L 1500 CC/SB with suspension mods and 22s for under $60K.
 
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Originally Posted By: ammolab
Originally Posted By: user52165
Originally Posted By: HerrStig
The elephant in the room is WHO made the oil filter?


+1 - what filter was it?


Thread shavings "for the oil filter", not FROM the oil filter. I read that the oil filter mounting threads are the problem.

They did not say change the oil AND filter. Seems if the filter is the problem they would have made a big deal about getting it off the car.


I think the point is this, if the contamination is after the filter it should be deposited in the pan (after going through the engine) and then caught by the filter. That should happen within minutes of the engine being started for the first time.
 
Originally Posted By: used_0il
Maybe if Corvette took their own advice and used 0W40, 15W50 or something half-way in between like 5W40 or 10W40, there wouldn't be a problem in the first place.

My Corvette one of these years, will be a 6.2L 1500 CC/SB with suspension mods and 22s for under $60K.


^^GM should spec 15W50 at all times for its flagship car just like Ford specs 5W50 for its flagship car.
 
Originally Posted By: Marco620
LOL at heartbreak of America.
+1 - a shame really from the heady days at GM...
 
Originally Posted By: dishdude
I see the GM bashing flash mob came out!
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Yup, ANY and EVERY chance they get, and of course they are joined quite vociferously by the anti-gummint/POTUS zealots, and Toyota/Nippon manufacturer deifiers as well (and as expected).
smirk.gif
 
Snoman002
[/quote] I think the point is this, if the contamination is after the filter it should be deposited in the pan (after going through the engine) and then caught by the filter. That should happen within minutes of the engine being started for the first time. [/quote]

I wonder what the contribution is of the dry sump system. These warnings only apply to those so equipped. Do they ALL have dry sump?
 
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That would be a Champ Labs AC/Delco on that Corvette built by Rank Group/FRAM.

And the prior reports did attribute the failure to threading debris from the oil filter, not the machining on the engine itself.
 
Understood. I was thinking in terms of whatever the contamination was. Wondering if it fouled or otherwise degraded the dry sump system. Grasping at straws as to the failure mode.
 
Originally Posted By: dailydriver
Originally Posted By: dishdude
I see the GM bashing flash mob came out!
34.gif
banana2.gif



Yup, ANY and EVERY chance they get, and of course they are joined quite vociferously by the anti-gummint/POTUS zealots, and Toyota/Nippon manufacturer deifiers as well (and as expected).
smirk.gif



Completely ignoring that this is an ultra high performance car, many are being tracked and raced and the failure rate is still under 1%. Considering the amount of power this engine puts out and the way it is operated, of course the failure rate is going to be higher than a Cruze/Corolla/Camry/Malibu type car.
 
Here's the operative paragraph in the bulletin:

Some 2014/2015 Z51 and Z06 Corvettes may experience a condition that leads to oil leaking out from the air cleaner assembly. This condition may be caused by running the engine continuously at a high engine speed with the first factory fill oil, resulting in silicone sealants in the engine’s gaskets degrading the oil’s anti-foaming agents. The oil foam has no effect on the engine’s durability.'

Effective Immediately:

GM is changing the required maintenance schedule for all 2014/2015 Z51 and Z06 Corvettes equipped with dry sump systems. The new schedule will require the oil/filter be changed immediately after the break-in period, which occurs after the first 500 miles of operation. Once the break-in oil change is performed and the Oil Life Monitoring system is reset, customers should follow the Oil Life Monitoring system for all future oil change needs.
 
Originally Posted By: ZeeOSix
"Chevrolet said that it was upgrading its manufacturing process to minimize the risk of contaminating the oil. The cause could be thread shavings for the oil filter which may have made their way into the oil pan when the threads were tapped."

The Oil filter should catch virtually everything greater than 20 microns if the filter is any good. It think there is more to this story than just "contaminated oil".


It depends where. If it is generated before the filter then there is no problem. If it occurs at the outlet then it becomes VERY serious...
 
Originally Posted By: SteveSRT8
Originally Posted By: ZeeOSix
"Chevrolet said that it was upgrading its manufacturing process to minimize the risk of contaminating the oil. The cause could be thread shavings for the oil filter which may have made their way into the oil pan when the threads were tapped."

The Oil filter should catch virtually everything greater than 20 microns if the filter is any good. It think there is more to this story than just "contaminated oil".




It depends where. If it is generated before the filter then there is no problem. If it occurs at the outlet then it becomes VERY serious...


Yes, BUT, anything after the filter should have done it's damage and ended up in the pan after the first few moments of running. From there it should be caught by the oil filter on it's next go around.

If it was lodged in the passageways for a while then changing the oil and filter would have no effect and the motor is just a ticking time bomb at that point.
 
Originally Posted By: DeepFriar
I wonder what the contribution is of the dry sump system. These warnings only apply to those so equipped. Do they ALL have dry sump?


No, only the blown Z06, and the NA Z51 optioned (kind of a 'track pack' type option) cars get the (semi) dry sump system, as will the ZR1 version, IF they ever release one.

This leads me to believe that there is a different, remote(??) filter housing on these cars, which has the thread flashing debris problem, since they don't issue the same warning for the base, and NA, non dry sump cars.
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No, the oil filter on the LT4 is mounted on the dry-sump oil pan in the same location as the LT1 with the wet sump pan. The same filter is used on the LT1 and LT4.
 
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I've been trying to research this on the internet and all I can find is 1 or 2 cars that had a problem. High performance cars are going to be more susceptible to this. Its not a mini van.

The LS engines are rock solid in general. But we have all the minions jumping up and down.
 
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