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#3241145 - 01/07/14 08:44 PM Troubling UOA
JMarshall Offline


Registered: 01/07/14
Posts: 8
Loc: NW PA


Latest UOA for my 2.0 CR Jetta TDI. Thoughts?


Edited by JMarshall (01/07/14 08:45 PM)

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#3241152 - 01/07/14 08:53 PM Re: Troubling UOA [Re: JMarshall]
dparm Offline


Registered: 04/19/10
Posts: 12569
Loc: Chicago, IL
There is a lot of wear going on there, and there has been for a while now. I don't think a 10k change interval is appropriate for your driving style or habits -- the oil is falling out of grade and you've got heavy fuel contamination that isn't being burned off. Are you doing a lot of city driving?
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#3241161 - 01/07/14 08:58 PM Re: Troubling UOA [Re: JMarshall]
JMarshall Offline


Registered: 01/07/14
Posts: 8
Loc: NW PA
I would say that my driving is 70% city, if you can call my area city, running Castrol LL03, no fuel additives, and B5 fuel. I am also a fairly heavy footed driver. Also, the high numbers on the last 2 UOAs is cause the car was brand new. They were run on samples at 10K miles and 20K miles

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#3241164 - 01/07/14 09:03 PM Re: Troubling UOA [Re: JMarshall]
ls1mike Offline


Registered: 06/14/08
Posts: 3157
Loc: Bremerton Wa
What is cheaper? An engine or a couple of extra oil changes a year. I would not go 10K.
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#3241166 - 01/07/14 09:05 PM Re: Troubling UOA [Re: JMarshall]
simple_gifts Offline


Registered: 07/26/04
Posts: 9120
Loc: Middlesex County CT
I don't know squat, but I'd do what B-S suggests; if a 5K interval produces 1/4 the wear...

I'd try to establish whether the wear is linear, or geometric etc.
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#3241168 - 01/07/14 09:05 PM Re: Troubling UOA [Re: JMarshall]
volk06 Offline


Registered: 10/04/10
Posts: 4323
Loc: Iowa
Your engine has only had 3 oil changes in 30K. Thats about 3-5 less OCIs than the average person. While your wear is high its due to the long OCIs and the engine breaking in. If you want to see if you can get lower wear, do a few short OCIs and then sample. That oil looks WEAK as well. What oil is specified for this engine? It looks like it needs to move up to M1 0w40 if that is an approved oil. I'm assuming this is a diesel engine?
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#3241172 - 01/07/14 09:05 PM Re: Troubling UOA [Re: JMarshall]
spasm3 Offline


Registered: 05/30/10
Posts: 4018
Loc: out there
Did coolant somehow get in the oil? The K+ is lower but was really high initially.
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#3241173 - 01/07/14 09:06 PM Re: Troubling UOA [Re: JMarshall]
ram_man Offline


Registered: 03/15/13
Posts: 1759
Loc: southern mo
3,000 mile oci never hurt anyone.
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#3241180 - 01/07/14 09:12 PM Re: Troubling UOA [Re: JMarshall]
simple_gifts Offline


Registered: 07/26/04
Posts: 9120
Loc: Middlesex County CT
Quote:

Did coolant somehow get in the oil? The K+ is lower but was really high initially.


Saw that but the glycol test is 0. Wonder if that is a valid test for VW coolant.
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#3241183 - 01/07/14 09:13 PM Re: Troubling UOA [Re: ls1mike]
JMarshall Offline


Registered: 01/07/14
Posts: 8
Loc: NW PA
Originally Posted By: ls1mike
What is cheaper? An engine or a couple of extra oil changes a year. I would not go 10K.


Definitely the oil. If I'm sitting on a ticking time bomb though, I want to trade it in before [censored] hits the fan.

Originally Posted By: simple_gifts
I don't know squat, but I'd do what B-S suggests; if a 5K interval produces 1/4 the wear...

I'd try to establish whether the wear is linear, or geometric etc.


Will do a couple shorter OCIs and see what it does.

Originally Posted By: volk06
Your engine has only had 3 oil changes in 30K. Thats about 3-5 less OCIs than the average person. While your wear is high its due to the long OCIs and the engine breaking in. If you want to see if you can get lower wear, do a few short OCIs and then sample. That oil looks WEAK as well. What oil is specified for this engine? It looks like it needs to move up to M1 0w40 if that is an approved oil. I'm assuming this is a diesel engine?


This is a 2011 VW Jetta TDI. I am running both the 10K mile oil changes specified by VW, as well as the Castrol SLX Pro LLO3 full synthetic 5W-30 that is both specified and factory.

Originally Posted By: spasm3
Did coolant somehow get in the oil? The K+ is lower but was really high initially.


I have had no coolant loss or leakage.

Originally Posted By: ram_man
3,000 mile oci never hurt anyone.


Actually, multiple UOAs have found that shorter intervals can actually increase wear in these VW TDIs

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#3241189 - 01/07/14 09:20 PM Re: Troubling UOA [Re: JMarshall]
ls1mike Offline


Registered: 06/14/08
Posts: 3157
Loc: Bremerton Wa
Don't believe anything VW says, I am not an engineer, but UOA results are tangible...Now having said that I had an 02 TDI, totally different animal, but I did their recommended OCIs and the results were poor. I shortened it up to 4500-5000 miles and wouldn't you know it never had a bad UOA again.
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#3241193 - 01/07/14 09:23 PM Re: Troubling UOA [Re: JMarshall]
gregk24 Offline


Registered: 04/13/13
Posts: 3055
Loc: FL, USA
10K is just too long, go short this time and see where its at.
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#3241195 - 01/07/14 09:27 PM Re: Troubling UOA [Re: JMarshall]
Rand Offline


Registered: 08/20/03
Posts: 7981
Loc: Barberton,Ohio
is the one of the ones that eat the camshafts?
I'd probably trade it asap.

maybe a new VW if you prefer those.


Edited by Rand (01/07/14 09:28 PM)
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#3241196 - 01/07/14 09:28 PM Re: Troubling UOA [Re: ls1mike]
Ramblejam Offline


Registered: 11/05/13
Posts: 1019
Loc: Kentucky
Originally Posted By: ls1mike
Don't believe anything VW says


Bingo -- what's great is seeing guys running non-507.00 products (GASP!!) and returning excellent UOA results.

"After replacing the worn cam at 53k miles, the car (PD DSG Jetta) had TDT for the first interval, and then has had T6 for the rest. No wear on the new cam after 80k miles."


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#3241198 - 01/07/14 09:29 PM Re: Troubling UOA [Re: JMarshall]
demarpaint Offline


Registered: 07/03/05
Posts: 21537
Loc: NY
10K OCI is too long, forget the owners manual, cut the interval in half and see how thing pan out. Just out of curiosity do you have an OLM? If so how long before it triggers an OCI?
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