08 Passat 2.0T (BPY) with 1st run of RLI 5w40

[UG_Passat]

Some notes:

About 4950 miles on oil (1st time with RLI 5w40 oil). Did not top off oil, burned about a 1 quart of oil.

Engine has 35,000 miles as of oil change/analysis.

Copper: is an additive (there is useage)

Silicon: probably from the K&N filter. (need to see if there as a AFE filter for the specific size I need)

Magnesium/Phosphurous/Moly: May be residual from other oils used (ie, Castrol Syntec 5w40, did a VOA on it also, but it was a blackstone VOA)

Viscosity: Deleted at UG's request

TAN: Actually decreased, supposedly a benefit of HOBS

Flash: Closed cup & with lower fuel dilution than VOA

Oxidation: lower than VOA...probably benefit of HOBS

Nitration: Good fuel & tune is also good.

KF (Water): Good drop, may be running a tad hot

TBN: It's a quart low on purpose. IF I topped off, TBN would be better.

Fuel Dilution: NOte less. Part of it is the aromatics with the oil/additive. After the intitial "heat cycling", the residual burns off.

Sulfate by-products--- really good.

 

[d00df00d]

Might want to delete some of that interpretive info. Part of the terms of a Dyson analysis is that you're not supposed to share that stuff.

 

[UG_Passat]

the main that should be delted when you reminded me would be the viscosity note.

the rest...why some of the values are lower than VOA? Benefit of HOBS is pretty vague enough.

Though without some of the commentary, it will result in:

 

[Pablo]

Doesn't this engine at least call for a medium-low SAPS oil?

 

[UG_Passat]

It calls for a VW502.00 oil, which is a full SAPS oil.

505.01 is a mid-SAPS, which AFL is formulated to meet.

504/507 is a low-SAPS

 

[d00df00d]

Originally Posted By: UG_Passat
the main that should be delted when you reminded me would be the viscosity note.

the rest...why some of the values are lower than VOA? Benefit of HOBS is pretty vague enough.

It doesn't matter how specific you are. The point is not to be sharing Terry's interpretations (unless they're really common knowledge). Since I'm not a lube guru, I'll have to take your word that those other comments are yours and not Terry's. Just reminding you to be careful, is all. Terry's UOA services are very important in the community, and they depend on the confidentiality of his interpretations.


Originally Posted By: UG_Passat
Though without some of the commentary, it will result in:

Actually, with the data but not the comments, wouldn't be the opposite -- information without conclusions?

Anyway, what's the intent of the post? To ask what we think, or to tell us what to conclude?

 

[REDDOG]

The silicon actually looks pretty good when you subtract the amount in your virgin sample, so I'm not sure I'd be in a huge hurry to disturb your K&N. Chromium and nickel look fine as well.

How does this compare to previous oils you've used in terms of wear and oil life? Is this engine DI and/or have you had fuel dilution issues in the past? Just curious.

Thanks,

REDDOG

 

[amati63]

For a car of that mileage, it seems that 1 quart of oil burned less than 5000 miles is worrisome.

 

[agpatel]

I have a 06 gti, same motor, 1 quart/5k is semi normal i think via the manual. One issue with oil burning is the PCV system causing major oil consumption issues.

 

[JAG]

Originally Posted By: UG_Passat

TAN: Actually decreased, supposedly a benefit of HOBS
That makes no sense to me. What is the theory that is used to explain this?

Originally Posted By: UG_Passat

Flash: Closed cup & with lower fuel dilution than VOA
VOAs do not have fuel in them so doesn't this indicate that the lab is having issues with the test methodology or interpretation of the data?

Originally Posted By: UG_Passat

Oxidation: lower than VOA...probably benefit of HOBS
Oil oxidation does not reverse, even if it is corn oil, so what is going on? I think there is again a methodology or interpretation problem but I'd like to hear the theory that is used to explain this.

 

[RI_RS4]

I can't speak for TAN, but Fuel just plain looks wrong, since flashpoint is 410 for virgin and 335 for UOA. I'd say that the number should have been 0.142, instead of 0.142.

Oxidation number differences are in the noise. Basically the oil did not oxidize, and viscosity index remained stable.

Given the Karl Fisher water number, the VOA sample had absorbed quite a bit of moisture.

I can also say that I have samples where TAN does decrease for Biosyn, both over the VOA value and from multiple samples.

 

[Quattro Pete]

Originally Posted By: RI_RS4
Given the Karl Fisher water number, the VOA sample had absorbed quite a bit of moisture.

Yeah, that's really strange. Contaminated sample bottle? Not properly closed sample bottle?

 

[JosephH1]

UG_Passat, did you dump the oil or did you add a quart and keep the oil in service to determine far you can run it? I will be using the 05w40HD for the first time this week.

 

[agpatel]

I am going to guess you have the newer Cam shaft, intake side, for the fuel pump follower. I was wondering if adding zddp additive would help as its is a tappet style follower and the old motors with the tappet style valves have issues with the new oil b/c of the lack of zddp. I wondering if the RLI needs this to help with this style follower.

 

[agpatel]

nvm, should not worry about it, talked to Terry and said the RLI has good enough measures for the flat tappet style fuel follower.

 

[bulwnkl]

Originally Posted By: RI_RS4
I can also say that I have samples where TAN does decrease for Biosyn, both over the VOA value and from multiple samples.


As do I.

 

[UG_Passat]

Originally Posted By: JosephH1
UG_Passat, did you dump the oil or did you add a quart and keep the oil in service to determine far you can run it? I will be using the 05w40HD for the first time this week.


dumped the oil.

 

[zoomzoom]

Originally Posted By: RI_RS4


Oxidation number differences are in the noise. Basically the oil did not oxidize, and viscosity index remained stable.



I have really hard time believing that oil did not oxidize in 5K miles OCI!?

 

[bruce381]

I do not know but I think the "normal" oxidation numbers derived from a normal IR spectra do not apply well to this oil. A full "wide" spectra would perhaps show oxidation in an other rangg that would.

stable VI is not un common.

Oil looks OK TBN drop looks normal TAN drop is perhaps due to test method in that again this oil may NOT respond well to "normal" oil tests and as such a diferent TAN method may show more accurate answers.

All oils will oxidize and form acids seems to me that normal testing perhaps will not show this. Over time better testing designed for HOBS oils may be needed.

bruce