5.3 oil consumption

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seagravedriver

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I am looking at having to add a quart of oil about every 1,400 miles or so. While the Yukon rides and drivers great, I have never had a vehicle drink so much oil. I have not kept a real close record, but I am going to start. We took a 3k mile trip, started with a fresh oil change, and added a quart at 1,400 mile increments. If it is doing this with around 50k on the engine, what does my future look like. While it is my first non Ford vehicle I have ever owned, this is a bummer. BUT, we like it so much, we probably would buy another.
 

2 E L O

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Mine takes a quart about every 4k miles....Right now I'm at 75k on the odometer. The oil consumption started with around 65k or so on the clock.

This is a very common issue that I've never heard a good explanation for. Apparently GM just says that amount of oil consumption is "within spec" for these engines.
 

Modded

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If GM claims nothing is wrong with it then just take it to a mechanic and see what is said about it.

---------- Post added at 03:34 PM ---------- Previous post was at 03:30 PM ----------

BTW I bet you have a bad oil level sensor. They are not expensive to replace!
 

ezdaar

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Is inside of your intake all oily?
Have oil on Any plug?


My buds Ls1 drank oil bad, we found out it was the SUPER bad design of the PCV system.
After rerouting, addinga good checkvalve and a home made Catch can stopped ALL his oil consumption along with stopping all oil from entering intake...
 
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seagravedriver

seagravedriver

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My local GM/Chev dealer said that is WAAAAY to much oil use, (duh, but good to hear anyway). It goes in for a leak check that should take about 30 minutes, and then back to dealer every 500 miles. Service writer says there is a baffle plate that needs to be updated. I will keep you updated.
 

InTruckDesign

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I have heard about the need for a baffle to be replaced, also the PCV valve may need to be updated as well. I believe around the 06-07 model years GM switched from a variable orifice valve to a fixed orifice, the latter was said to correct some oil consumption issues. And GM does run the PCV right back into the intake manifold, I'm running a catch can from Elite Engineering and typically empty it every 2k miles or so and usually have less than a cup of oil to drain.
 

Crunch

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I am looking at having to add a quart of oil about every 1,400 miles or so. While the Yukon rides and drivers great, I have never had a vehicle drink so much oil. I have not kept a real close record, but I am going to start. We took a 3k mile trip, started with a fresh oil change, and added a quart at 1,400 mile increments. If it is doing this with around 50k on the engine, what does my future look like. While it is my first non Ford vehicle I have ever owned, this is a bummer. BUT, we like it so much, we probably would buy another.

Seagravedriver - I had the same problem with my 2007 Tahoe and took it in to the dealer. I explained to the tech what I was seeing with the oil level and he knew exactly what I was talking about. He said I needed to have an oil consumption test done. I changed the oil and after 1900 miles I lost about 2 quarts. I call the dealer and explained to the tech what took place. He stated the valve seals are probably leaking oil into the cylinder. To correct this they will replace them free of charge since I have under 100K on the engine. I take it in on Friday to have the problem corrected. If this does not correct the problem, they will replace the O-rings next.
Hope this helped many Chevy fans out there. Feel free to email me if you need more details.

Crunch.
 

taylorjm

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I read that unless it uses more than 1 qt every 2000 miles, then it's within gm specs and they won't do anything about it.
 

Dave_2003_TRZ06

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A good oil catch can between the PCV Port and intake should knock the consumption down some. I have had to use them on my F-bodies and Z06. I bet if you pull the throttle body and shine a flash light into intake you will see the intake floor coated in oil. Ford apparently makes a one-way pcv valve that fits in the stock location, could try that as well, although I haven't tracked down a part number.
 
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