Mobil Delvac 5w40 in '03 TDI

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Adding a UOA from April -- oil was not tested when changed in February. Test performed by Oil Analyzers Inc.

First number is Delvac. Second number is Elf at 10.6k. Third is the same Elf at 14.0k. Fourth is Delvac at 9.6k. Fifth is Delvac at 9.8k. Sixth is Delvac at 9.5k
May 28 -- July 29 -- August 20 -- October 29 -- Dec 22 -- Apr 29
161421 -- 172095 -- 175508 -- 185142 -- 194915 -- 215121

Iron 38 -- 96 -- 152 -- 77 -- 41 -- 34
Chromium 1 -- 2 -- 3 -- 1 -- 1 -- 2
Lead 2 -- 3 -- 6 -- 3 -- 3 -- 1
Copper 3 -- 4 -- 5 -- 2 -- 2 -- 6
Tin 0 -- 0 -- 0 -- 0 -- 0 -- 0
Aluminum 7 -- 7 -- 6 -- 6 -- 5 -- 12
Nickel 0 -- 4 -- 0 -- 0 -- 0 -- 0
Silver 0 -- 0 -- 0 -- 0 -- 0 -- 0
Silicon 5 -- 10 -- 8 -- 5 -- 1 -- 12
Boron 29 -- 82 -- 57 -- 34 -- 29 -- 41
Sodium 0 -- 0 -- 2 -- 0 -- 0 -- 0
Magnesium 615 -- 367 -- 287 -- 582 -- 491 -- 663
Calcium 2775 -- 3109 -- 2381 -- 2861 -- 2346 -- 3018
Barium 0 -- 0 -- 0 -- 0 -- 0 -- 0
Phosphorus 1231 -- 1133 -- 1108 -- 1422 -- 1256 -- 1299
Zinc 1528 -- 1477 -- 1322 -- 1712 -- 1577 -- 1617
Moly 1 -- 0 -- 1 -- 0 -- 1 -- 0
all others 0 -- 0 -- 0 -- 0 -- 0 -- 0

Fuel Viscosity @ 100C =15.33 -- 11.39 -- 11.52 -- 16.05 -- 16.33 -- 16.36
Water 0 -- 0 -- 0 -- 0 -- 0 -- 0
Soot 1.28% -- 1.64% -- 1.94% -- 1.47% -- 1.25% -- 1.05%
Coolant = none -- none -- none -- none -- none -- none

TBN = 7.35 -- 6.52 -- 6.32 -- 7.44 -- 5.42 -- 8.06

Filter was Wix. Driving pattern was my normal 200-250 miles/day, a mix of city and highway. There were no long highway trips.

The injector nozzles were replaced with Kerma (Bosio) PP520's on Feb 2nd, about two weeks before the Feb 17th oil change. So new nozzles during the entire interval.

Soot is high but trending down. Silicon is just slightly elevated. Copper and aluminum a bit high. Viscosity pretty high, as in recent tests.

Next oil change in early July.

Previous discussion regarding this engine here:
http://theoildrop.server101.com/forums/showflat.php?Cat=0&Number=583320
and here:
http://theoildrop.server101.com/forums/showflat.php?Cat=0&Number=583403
 
Looks great. Engine doesn't like that thin oil(Elf). You need better tuning/fuel/filtration to deal with soot. A bypass filter would allow you to push those OCI's.
I also wonder if some of the soot reduction is caused by ULSD fuel, or those fancy injectors.

Since TBN is consistently high, save your $10
cheers.gif


Get a bypass filter(TP style) and double your OCI's easily.
 
Another good D1 report. Since silicon and aluminum spiked, have you checked your airbox for a leak? It's nice to see the soot numbers trending downward too. This is definitely the oil for your engine.
cheers.gif
 
You guys are going to love my next UOA.

My current fill is the same Delvac 1 5w40. But I also added 300 ml of Lubro-Moly MoS2 Anti-Friction Engine Treatment. I installed new injector nozzles in February, and I've been getting better fuel mileage since then, so I won't be able to separate out any MPG effect. But it will be interesting to see the metal wear numbers.
 
Hi there! Definetly the Delvac is far more better then Elf.
U should keep on with Delvac that's for certain. About that molybden bysulfate anti frictioner I don't know what to say cause here in Europe some people says it does not do good in a diesel engine - what I heard...
Anyway Delvac 1 (a true diesel oil) does'nt have much molybden either. Think about it.
 
Quote:


About that molybden bysulfate anti frictioner I don't know what to say cause here in Europe some people says it does not do good in a diesel engine - what I heard...
Anyway Delvac 1 (a true diesel oil) does'nt have much molybden either. Think about it.



I know, some diesel oils have moly, probably most do not. But that little can was sitting there on the shelf.

I don't think moly is harmful, it's just not necessary and it would add to the cost of a diesel-rated oil.

I'm about 2500 miles from my next oil change. I wasn't going to use the MoS2 again... but heading into July and August, which are my two worst months for fuel economy, maybe I really ought to try it for another 10k mile OCI.

There are just so many variables -- I can't tell whether any single factor makes a difference. (Now I've got new tires, so that's going to hurt my mileage.)
 
Looks good, but I would consider longer intervals. There is a pretty long thread at TDIClUB about how there is more wear when doing these shorter oil changes. These oils are designed to be ran longer, so the additives are designed to activate later on in it's life cycle. I really do not think there was any difference in your oil. Look at your soot levels. You had a spike in those when you were using the ELF. Something was going on with your motor. I am dealing with high soot levels now. I believe my EGR is hung up, and from the looks of your oil, yours was as well. The good news for you is that your soot is on its way down. I am not so fortunate.

These motors should have <1% soot. Around 0.6% would be best.
 
Hi,
Delvac 1 5w-40 has exceptional soot handling ability and will tolerate soot to around 3.5% without increasing wear rates

Some engine Manufacturers set a max % of soot and this should of course be followed

I would seek a 40C viscosity test, TAN and PQ Index for your future UOAs

Overall trends are very good and there are no spikes

Regards
Doug
 
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Mobil will be using moly and boron in its ESP oils - that will probably include Delvac 1 ESP. Moly does have its place and can be a very good additive in the right measure. I know that Castrol is using it in its SLX III 507.00 oil, about the same levels of Mobil. Less by George's VOA but more than what showed up in the first UOA we saw at the TDI club. Eventually TR you will have to use ESP as I think Mobil will not have two different Delvac 1 oils. 1300 is the mineral version and Elite the synthetic 15W40.
 
Summary of Delvac UOA in a VE TDI
I have two recent tests to report. There were oil changes in Feb 2007 and Sept 2007 from which no samples were taken.

First number is Delvac. Second number is Elf Evolution CRV at 10.6k. Third is the same Elf fill at 14.0k. Fourth is Delvac at 9.6k. Fifth is Delvac at 9.8k. Sixth is Delvac at 9.5k. Seventh is Delvac at 9.9k with 300 ml of LubroMoly MoS2. Eighth is Delvac at 11.7k.

May 28 - Jul 29 - Aug 20 - Oct 29 - Dec 22 - Apr 29 - Jul 1 - Nov 25
161421 - 172095 - 175508 - 185142 - 194915 - 215121 - 225060 - 246883

Iron 38 -- 96 -- 152 -- 77 -- 41 -- 34 -- 24 -- 26
Chromium 1 -- 2 -- 3 -- 1 -- 1 -- 2 -- 1 -- 0
Lead 2 -- 3 -- 6 -- 3 -- 3 -- 1 -- 1 -- 0
Copper 3 -- 4 -- 5 -- 2 -- 2 -- 6 -- 4 -- 2
Tin 0 -- 0 -- 0 -- 0 -- 0 -- 0 -- 7 -- 0
Aluminum 7 -- 7 -- 6 -- 6 -- 5 -- 12 -- 8 -- 10
Nickel 0 -- 4 -- 0 -- 0 -- 0 -- 0 -- 0 -- 0
Silver 0 -- 0 -- 0 -- 0 -- 0 -- 0 -- 0 -- 0
Silicon 5 -- 10 -- 8 -- 5 -- 1 -- 12 -- 8 -- 9
Boron 29 -- 82 -- 57 -- 34 -- 29 -- 41 -- 27 -- 28
Sodium 0 -- 0 -- 2 -- 0 -- 0 -- 0 -- 0 -- 0
Magnesium 615 - 367 - 287 - 582 - 491 - 663 - 698 - 652
Calcium 2775 - 3109 - 2381 - 2861 - 2346 - 3018 - 3412 - 3257
Barium 0 -- 0 -- 0 -- 0 -- 0 -- 0 -- 0 -- 0
Phosphorus 1231 - 1133 - 1108 - 1422 - 1256 - 1299 - 1254 - 1290
Zinc 1528 -- 1477 - 1322 - 1712 - 1577 - 1617 - 1505 - 1406
Moly 1 -- 0 -- 1 -- 0 -- 1 -- 0 -- 323 -- 6
all others 0 -- 0 -- 0 -- 0 -- 0 -- 0 -- 0 -- 0

Fuel Visc @ 100C =15.33 - 11.39 - 11.52 - 16.05 - 16.33 - 16.36 - 16.36 - 14.65
Water 0 -- 0 -- 0 -- 0 -- 0 -- 0 -- 0 -- 0
Soot 1.28% - 1.64% - 1.94% - 1.47% - 1.25% - 1.05% - 0.68% - 0.70%
Coolant = none -- none -- none -- none -- none -- none --none --none

TBN = 7.35 -- 6.52 -- 6.32 -- 7.44 -- 5.42 -- 8.06 -- 7.15 -- 7.68

Driving pattern was normally 200-250 miles/day, a mix of city and highway.

New PP520 nozzles were installed Feb 1 2007. RC2 chip was installed June 30 2007. The soot and wear numbers were already declining prior to each performance upgrade.

All fuel since spring 2006 has been ULSD. A total of 22 gallons of B99 were used in Nov 2007, just prior to the last OC/UOA -- so about 6.9% of the fuel burned during that interval.

I am not sure why these last few test were so good, especially the last one which was 11,660 miles. That's about 2.2 ppm of Iron per 1000 miles!
 
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