Burning oil bad in 2014 Sierra

redwngr · January 19, 2018

Oil life (% remaining) is an indication of what the condition should be base on how the engine has been used since the system was reset.

It is NOT the same as checking the oil level.

Oil condition could be perfectly fine, even if it has leaked out a quart or 2 from 'wherever'. (or burned it internally)

I't clear from the posts that some think the oil life system (life %) somehow considers level --- but it does not.

BringTheRain403 · January 19, 2018

Um I dunno what you're reading. I saw one post that mentioned the oil life monitor. Most people mentioned how much oil burned off over a certain number of miles...

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Tidan99 · March 13, 2018

Same prob... My truck is A GMC Sierra 2014, All Terrain, 5.3.

47 809 km (oil change) Perfect level, 100%

49 253 km Perfect level, 84%

51 164 km loss 1 liter, refill, 53%

52 762 km loss 1 liter, refill, 37 %

Next 3 weeks...

No Explications!?

wforrest08 · March 13, 2018

On 1/18/2018 at 11:25 AM, EFLine said:

Dumb question but what is the warranty on the engine, i stopped going to dealer for oil checks cause i swear they added oil to it one time and sent me on my way. is it 100k?

14-15 5year/100k

16+ 5year/60k

johnnymordoc · August 1, 2018

Well - I was bringing my truck into have it serviced before I went on annual trip - oil changed etc...... and to replicate the same scenario that I had last year when engine oil light came on.

I had been having the dealer do the consumption test check every 1000 miles or so.

When I brought it in for service they checked and I was at 53% - and they recommended service at 20%.

They checked the oil this time and I was down a quart.

It just turned 52000 miles on the truck - motor is just getting broken in.....

Because of this and the ongoing test they are going to tear it apart.

Like it was mentioned earlier - why not swap out the motor - what additional problems am I going to have because they tore it apart??

How does that affect my warranty going forward - they add another 100K?

I heard something that the reason they increased the amount of oil from 6 quarts to 8 quarts was because of this issue?

What do I have to look forward to?

The fact that you need to add oil to new vehicle that is under 100K miles is crazy......

I do not consider that normal.

Thanks in advance for any tips or suggestions.

BringTheRain403 · August 1, 2018

Had the same issue. They rebuilt everything. The warranty on the rebuilt motor is 1yr or 12k

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Doublebase · August 1, 2018

I e done oil changes on a number of the Silverados 2014-2018's. I've found them to be a mixed bag as far as oil consumption. I've only seen one that I can say...wow, this thing has a problem. It's a 2015, the lady that owns it changes the oil every 5,000 miles, it no wonder has 60,000 miles. The low oil light comes on between every oil change and we add two quarts, that holds her over until she changes it.

But the other ones we do seem ok, they're maybe 1/2 to a quart low after 5,000-7,000 miles. Now the 2007-2009's?? Oh my! I've seen some awful usage on those engines.

300 Blackout · August 2, 2018

A non-GM dealer changed my oil prior to delivery of my vehicle. They used Mopar 0W-20 but it wasn’t Dexos rated. The truck burned 2 quarts after 1000 miles of driving in Fall weather conditions.

I immediately changed the oil and replaced it with seven quarts of Gulf Full Synthetic Dexos 0W-20 and one quart of Lucas Pure Synthetic Oil Stabilizer. 4000 miles later (including sub-zero Winter weather) and it hasn’t consumed a drop of oil. Dip stick still reads like the day the oil was changed and the truck odometer just crossed 70,000 miles.

https://lucasoil.com/products/engine-oil-additives/pure-synthetic-oil-stabilizer

Silverado-Hareek · August 3, 2018

I don't think it's fair to keep saying that the quantity of oil went from 6 quarts to 8 quarts to hide a consumption issue. Especially since GM supposedly fixed the consumption issue in 2010 on the previous Vortec engines which still used 6 quarts of oil. There is no evidence of that other than frustrated customers speculating. More reasonably, they likely increased the quantity because the change from 5W-30 to 0W-20, which is almost the consistency of water, requires a little more volume to help it do it's lubrication job and withstand engine temperatures. I'm just speculating there...I'm not a mechanical engineer but that to me makes a little more sense than trying to mask a problem. Also, the readings on the dipstick would've been adjusted for the higher volume anyway, they didn't take the old engine and dipstick and add 2 more quarts of oil to it and not change anything about how the oil is measured.

I had a 2007 oil burner that burned 1 QT every 1,000-2,000 miles on average. So far (knock on wood), my 2014 oil level only drops to the halfway mark between "full" and "add oil" on the dipstick within a 5,000 mile oil change interval which would equate to roughly half a quart. That to me is acceptable since it never drops below the "add oil" mark in that time-frame. That also tells me that more consumption could be considered a problem. I agree that all engines will vary in how much oil they consume. It falls on us to use reasonable judgement as to what seems acceptable and what doesn't. Sharing your experience helps others gauge how their own trucks are behaving. I would say the OP has an oil burning issue for sure. Why though is the question. I would argue it's not a design issue since we all have the same design. It's either a manufacturing issue with his particular engine, or something broke/failed which can happen to anyone at random times.

Unforutnatley for the OP, the only path forward is to go through GM's annoying documenting process and hope that they'll agree there's a problem and replace your engine. Replacing it is the only solution that I'm aware of after reading countless threads about this issue for two generations of trucks now. If they won't replace your engine, you're either going to have to pay out of pocket to do it to the tune of about $7,000 or get rid of the truck and get something else.

BringTheRain403 · August 3, 2018

I was burning about 4 quarts over 7500 miles before my motor was rebuilt

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Silverado-Hareek · August 3, 2018

40 minutes ago, BringTheRain403 said:

I was burning about 4 quarts over 7500 miles before my motor was rebuilt

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On your 2014 K2?

BringTheRain403 · August 3, 2018

Yes sir. They rebuilt the bottom end and put new heads on it.

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johnnymordoc · August 3, 2018

Thanks for the feedback and information.

Sorry for throwing it out there about the increase from 6 QT to 8 QT - I may have seen that mentioned on another "board" and threw that out there.

I had a 2006 Tacoma V6 with almost 100K miles on it and never had the oil light come on as I can remember.

My old 1975 with a 350 V8 did burn some - but I bought used and it had some miles -- I remember putting 20-50w in it.

The fact that I bought the truck brand new..... spent a lot of money on it, have not abused it, keep up on regular maintenance and even broke the engine in by keeping my speed and RPM's down ... and it is burning OIL is a crime.

If I had 100K or even 200K and it burned some... I can understand that.

But with less than 50K on the motor - no leaks - no oil smell and having the engine oil light to on...

Luckily there was an oil change place open on a Sunday holiday weekend. If I had been out on the road or traveling it would have been a bit awkward.

I bought a GM truck because it is America made and got better performance that the Ford, Dodge, or Tundra.

Do I have any leverage to have them replace the motor instead of pulling it apart and putting new rings and pistons in....... maybe doing the heads.....

And then to honor the warranty the work for 12K- when the original drive warranty is 100K - then again it looks to expire next year (2019) even though I have another 50K to go.

I had really thought this was going to be my last truck purchase and last another 10 years.

Thanks again for the feedback.

BringTheRain403 · August 3, 2018

Your kind of stuck with what they give you when it comes to warranty repairs unless it goes in three times for the same issue and it's still not fixed. At that point you can lemon law it. FWIW mine was rebuilt at 47k and they decided on new heads while they were in there and it's been good so far.

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Rad64 · November 29, 2018

Silverado-Hareek, I can tell you that GM hasn't fixed the problem in 2010 because I had a 2013 with the classic symptoms and didn't find them until I was 2.5 quarts low on an oil change. I found cylinder #7 spark plug missing some porcelain on the combustion chamber side, changed out the plug and 10,000 miles later found the same plug oil fouled and looking worse than a plug I had pulled from my 2005 Tahoe 5.3L with 137,000 miles on it. I had called GM directly when my truck was under warranty and they denied that my VIN had any issues associated with it. That was until I found the right service bulletin that included my year and engine code. Unfortunately, when I found the good info, my truck was just outside of warranty and they beat me down. I accepted customer loyalty cash and traded that pig in for a 2018 with a redesigned engine. I can only hope I didn't get another lemon. Check out this service bulletin...

https://gm.oemdtc.com/683/engine-oil-consumption-engine-oil-consumption-on-aluminum-blockiron-block-engines-with-active-fuel-management-afm-2007-2015-cadillac-chevrolet-gmc-pontiac