2.0 Oil Consumption

[Wild_Willy]

Greetings. Long time lurker, but finally have a question that I can't find any information on. I have a 2020 JL w/ the 2.0 Turbo. Just turned 80k miles. It's been fine, a good running powerplant, until the last couple of weeks. It still runs fine, but suddenly it's developed quite an appetite for oil.

I check the oil regularly on all of our vehicles, but about 3 weeks ago I noticed the 2.0 was a quart low. Hmm. Unusual, but ok. Filled it up and checked it a couple of days later. It seemed a bit lower than when I filled it up last, but with the terrible dipstick on this engine it was hard to be sure. So, I let it go a couple of more days and it was low - another quart. So, I topped it back up again.

Long story short-ish, over the last 3 weeks, I've added almost 4 quarts of oil over the course of maybe 2k miles. Never had an issue before like this. Nothing leaking, not burning oil as best as I can tell. All the plugs look good. I do all my own maintenance and it gets full synthetic and a new filter every 5k. I'm stumped. Anybody have this type of issue before?

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[NWJeepr]

On a turbo engine, I'd also consider the turbo suspect. The seals can start to fail and oil can get past them and oil gets thrown into the exhaust. Not exactly sure how to check the seals, hopefully someone else will chime in.

 

[cripton805]

I would suspect a stuck PCV Valve. May need to be replaced.

 

[Old Dogger]

Welcome back to the Forum!
If not leaking, then the engine is burning the Oil. Probably turbo caused. But if the engine has been ingesting silicon (dirt), then it could also be worn piston oil control rings.

 

[mwilk012]

It’s burning it. Engines aren’t magic.
Either a bad turbo, pcv valve or piston rings. Valves seals wouldn’t get that high of consumption.
Does the 2.0 have the European style oil separator/pcv diaphragm?

 

[Wild_Willy]

Thanks everyone for you input so far. I will look into replacing the PCV valve to start.

It’s burning it. Engines aren’t magic.
Either a bad turbo, pcv valve or piston rings. Valves seals wouldn’t get that high of consumption.
Does the 2.0 have the European style oil separator/pcv diaphragm?

I don't know. How would I know the difference?

 

[mwilk012]

Thanks everyone for you input so far. I will look into replacing the PCV valve to start.



I don't know. How would I know the difference?

I checked, it does.
4893609AD, it’s listed as an “oil separator”, a large plastic housing that has baffles to encourage oil to drain from the PCV air flow path. The drains in them can get clogged and cause high oil consumption.

 

[cripton805]

Thanks everyone for you input so far. I will look into replacing the PCV valve to start.

I don't know. How would I know the difference?

I don't think they're the piston rings or turbo for a few reasons. It seems like it happened more suddenly vs. gradually over time. When rings wear out, you will notice a slow increase over time. At your mileage, I don't think you would have worn the rings unless you ran it without any oil.

You could have a shop run a compression test if you're really worried about that. The diag and labor fee will cost you a lot more than the PCV Valve. So, I'm hoping it's just a stuck PCV. It's a fairly common failure in all cars. Some people even replace them as a normal maintenance routine.

 

[mwilk012]

I don't think they're the piston rings or turbo for a few reasons. It seems like it happened more suddenly vs. gradually over time. When rings wear out, you will notice a slow increase over time. At your mileage, I don't think you would have worn the rings unless you ran it without any oil.

You could have a shop run a compression test if you're really worried about that. The diag and labor fee will cost you a lot more than the PCV Valve. So, I'm hoping it's just a stuck PCV. It's a fairly common failure in all cars. Some people even replace them as a normal maintenance routine.

The cheapest option by far is properly diagnosing the issue.

 

[cripton805]

https://mopar.oempartsonline.com/oe...PJpu63DmDgoE0DHD1A-a3pEu1MxpTdesaAsDIEALw_wcB

Here is the link to the PCV and it's #2 on the diagram.

 

[cripton805]

The cheapest option by far is properly diagnosing the issue.

It's a good educated guess. I'd be willing to risk $50 over a couple hundred dollars on a compression test & diag. Just to have to spend $50 on the PCV anyway. But that's just my opinion.

It's easy to replace a PCV.

 

[mwilk012]

It's a good educated guess. I'd be willing to risk $50 over a couple hundred dollars on a compression test & diag. Just to have to spend $50 on the PCV anyway. But that's just my opinion.

It's easy to replace a PCV.

Have you replaced an oil separator on a 2.0?
compression testing is a waste of time here.

 

[Wild_Willy]

Thanks everyone for your input. I'll try changing out the PCV first and see how that goes first and then report back. And you're right @cripton805 , it has happened rather suddenly, which makes me think it's not rings or the turbo itself. Either of those would have happened slower, over time, versus how quickly this problem came on. And with 81k miles, I wouldn't expect there would be a major problem with the engine yet, but with FCA/Stellantis quality control anymore, who knows.

 

[8ball]

Thanks everyone for your input. I'll try changing out the PCV first and see how that goes first and then report back. And you're right @cripton805 , it has happened rather suddenly, which makes me think it's not rings or the turbo itself. Either of those would have happened slower, over time, versus how quickly this problem came on. And with 81k miles, I wouldn't expect there would be a major problem with the engine yet, but with FCA/Stellantis quality control anymore, who knows.

Let us know what you find.

 

[Shibadog]

You did verify that the radiator isn’t showing oil. In the coolant? If the coolants good, I’d bet on the PCV

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