2014 oil consumption 5.3

[brendon444]

Many post on this but have a few specific questions. My truck seems to be burning oil with 90,000 km. Took my truck for an oil change today and started a consumption test. 5000km since last oil change and oil level was just touching bottom of the dip stick. Previous oil change was at 10,000 km interval and oil level was off the dip stick and oil low light would come on. 

 

So today i was told it only took 300ml to bring it from the bottom of the dip stick to full when they added oil with the automated gun, Is this true? Thought dip length would be more oil volume. 

That would mean my truck is only burning 300ml per 5000km. Would be off the dip stick if left to 6000km. To me this is unacceptable. 

 

How low is the truck on oil when the low oil light comes on? 

 

What is gm’s acceptable consumption?

 

 

 

[Largely Unknown]

These are great questions, please let us know what you find out.  

[truckguy82]

12 hours ago, brendon444 said:

Many post on this but have a few specific questions. My truck seems to be burning oil with 90,000 km. Took my truck for an oil change today and started a consumption test. 5000km since last oil change and oil level was just touching bottom of the dip stick. Previous oil change was at 10,000 km interval and oil level was off the dip stick and oil low light would come on. 

 

So today i was told it only took 300ml to bring it from the bottom of the dip stick to full when they added oil with the automated gun, Is this true? Thought dip length would be more oil volume. 

That would mean my truck is only burning 300ml per 5000km. Would be off the dip stick if left to 6000km. To me this is unacceptable. 

 

How low is the truck on oil when the low oil light comes on? 

 

What is gm’s acceptable consumption?

 

 

 

Oil light is based off oil pressure, so your pickup would need to be starved. It has to be very low for that.

[brendon444]

1 hour ago, truckguy82 said:

Oil light is based off oil pressure, so your pickup would need to be starved. It has to be very low for that.

I’m pretty sure  there is  a oil level monitor for level in the pan. Not pressure based. 

[truckguy82]

well I've been short 2.5 quarts and neither was triggered

[redwngr]

Cross hatched area on dipstick is 1L/1qt

 

There is both an oil level sensor and an oil pressure sensor.

 

Accurate oil level check (like when trying to accurately determine usage) requires it to sit long enough for oil to drain down. 

 

 

If a low oil Driver Information Center(DIC) message displays, check the oil level.
Follow these guidelines:
. To get an accurate reading, park the vehicle on level ground.
Check the engine oil level after the engine has been off for at least two hours. Checking the engine oil level on steep grades or too soon after engine shutoff
can result in incorrect readings.
Accuracy improves when checking a cold engine prior to starting. Remove the dipstick
and check the level.
. If unable to wait two hours, the engine must be off for at least  15 minutes if the engine is warm, or at least 30 minutes if the engine is not warm. Pull out the dipstick, wipe it with a clean paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip down, and check the level.

 

 

If the oil is below the cross-hatched area at the tip of the dipstick and the engine has been off for at least 15 minutes, add 1 L (1 qt) of the recommended oil and then recheck the level.

[brendon444]

Thanks for the information.

 

I did check my oil after sitting all night on level garage floor multiple times and it just touched the bottom of the dip stick. Below the lower dot. Dealer told me when I took it in for an oil change it only took 300ml to bring to full which they then dumped everything for an oil change.  I’m assuming it was at least a litre low based on the dip stick being below the lower dot. This was after 5000km.

 

Started consumption test after this oil change so everything is now documented and I will verify oil level with mechanic during  check ins. 

However acceptable consumption from gm is 1 litre per 3200 km (2000 miles). Mine seems to be 1 litre per 5000 km. If deemed acceptable I would still think that is a lot. 

[Donstar]

I went through a similar experience with my '09 Sierra 5.3.  Your dealer will want to control your consumption test.  Make sure you can see the full mark on your dipstick after they add oil.  (I was suspicious of them adding a little extra during the consumption test).  It took me over a year of "testing" if I recall but they finally got approval from GM to repair. I was given a loaner for a couple of days while they fixed the problem. (I am sorry that I no longer have the paperwork but it was a major repair)   I had my truck for another 80k km and never had to add oil between changes during that time.   Be diligent, respectful and don't give up.  You should still have enough power-train warranty to see this through.  There is a fix.  No modern american vehicle should require additional oil between scheduled service intervals.

[KARNUT]

I had two oil users, 94 Z28 and a 99 4.6 Ford P/U. Both were with in acceptable spec. according to the dealers. The Z28 went 130K and 8 years before being sold. The ford I put a Vortec S/C on it at 20K and traded in with 140K miles on it. Both ran great the only oil issue was cat replacement on the Z.


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