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Discussion Starter · #1 ·
I checked my oil today after filling up the car, and I noticed that the oil level is at the bottom line above the cross hatches. I changed my oil about 1500 miles ago, and it was in the middle of the top cross hatch area. I didn't let it sit very long after driving it, so I think it has probably consumed about 1/2 - 3/4 quart.

I have actually seen my car burn oil since the very early days. Here is a post from when the car had less than 3k miles.
http://www.cruzetalk.com/forum/34-g...o-new-engines-burn-oil-do-i-have-problem.html

And here is one from last year
http://www.cruzetalk.com/forum/34-gen1-1-4l-turbo/202490-oil-burning-hard-engine-braking.html

I decided to do a compression test this evening. All four cylinders were identical at 175 PSI. I also checked the PCV check valve again, and the little orange nipple is still there.

I followed the instructions in the service manual for doing a compression test. It says to remove the whole throttle body. The car only has 37K miles, but I expected a little carbon on the throttle plate. I was surprised to see that the throttle was spotless, like brand new. Virtually no carbon at all. But, it was completely covered in a thin film of clean oil. There was also a thin film of oil in the charge air hose and the intake manifold. I cleaned it as best as I could, installed a new intake o-ring and put it all back together.

There are no visible leaks anywhere and no sign of oil in the coolant. The car runs excellent. No hesitation. No misfires or skipping. No visible smoke out the back. No oil smells. Very good power and excellent acceleration. The only strange thing about this car is the oil consumption.

Any thoughts on what I should check next?
 

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Discussion Starter · #5 ·
Thank you for your thoughts on this. It's pretty cool to have some of the forum's top gearheads respond.

I checked the oil first thing this morning while the car was still cold. The oil level was on the bottom line above the hash marks. I added 24 ounces of oil to get it to the same level that it was at after I changed the oil.

There was no oil dripping under the throttle body, but the hose clamp was covered in dirty oil. I have had oil dripping below the TB before and I had to clean it. But it wasn't very bad yesterday when I removed it to do the compression test.

I decided to replace the corrugated hose today in case the valve in the hose has something wrong with it. There was some oil in the hose and there is a thick brown streak of oil going into the turbo inlet. I don't know how much is normal. I cleaned up the oil and cleaned the orange nipple in the intake.

I am thinking about switching to Amsoil at the next oil change to see if it makes any difference with oil consumption. XR makes a pretty good case for Amsoil.

After the power train warranty is up, I will install XR's PCV valve fix.
 

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Discussion Starter · #8 ·
Yeah, the presence of that much oil at the throttle body suggests the PCV system (or perhaps the turbo seals themselves) are your oil consumption culprit.

Sent from my SM-G950U using Tapatalk
Maybe I will install XR's PCV fix soon and see what happens. Wouldn't turbo seals produce some visible smoke? I thought the seals also leak into the exhaust when they are bad. I haven't seen any smoke, but I haven't had anyone follow me to check either.
 
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