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I have a question is it ok to change oil from factory fill on my 11 TTS even at 80k
it’s been oil serviced only at the dealer before me
I bought a case of DI40 for the next service
I personally have never run DI40 in a port injected engine, but I am going to put DI40 into my '06 GTI which current runs DT40 so I can do a comparison. I'll be sure to share the results.
Subscribed for when you share the results of running DI40 in your port injected engine. I hypothesize that your results with DI40 will be every bit as good as DT40. Thank you for all the information you have shared.
Technically, yes, DT40 can be run in an engine with direct injection as long as the engine is normally aspirated. If turbo or supercharged, an oil formulated for LSPI protection is required, like DI40.
Agree. DI40 also has a dispersant to help hold soot in suspension and prevent agglomeration.... I personally would run DI40 in a port injected engine without a second thought but would not run DT40 in a direct injected engine.
Subscribed for when you share the results of running DI40 in your port injected engine. I hypothesize that your results with DI40 will be every bit as good as DT40. Thank you for all the information you have shared.
2002 996 C2 w/ 61,500 miles.
I have four (4) different Speediagnostix tests on my oil since 08/04/2021, which was in preparation for a borescope and 10-Yr engine refresh. Historically I have used Millers Nano 5W40 for years and Lake suggested using DI40 to improve the viscosity number. The tests and oil used is below. As a side note, the engine is in great shape. Bores and oil tests are in good shape. No debris was found in sump nor in oil filter.
Test Info
Test 1 (Millers Nano 5W40) was on 08/04/21 in prep for a borescope and then engine refresh.
Test 2 (Millers Nano 5W40) was on 04/15/23 after engine parts refresh and then a 2400 mile road trip from Chicago to Phila and back.
Test 3 (Millers Nano 5W40) was on 05/06/23 after a PCA track day.
Test 4 (DI40) was on 07/01/23 after a PCA track day.
Below are the test results from all 4 tests. You can see the additives in both oils which are robust. You will also notice that it looks like Millers changed their additive package sometime last year.
Below are the test results comparing "new" out of the bottle oil from Millers Nano 5W40, DI40 and Castrol Syntech 5W/40 which I run in my Audi Q7 and A5 per the dealer recommendation. You will find the comparisons interesting.
Sure, would be interested to see it. Millers virgin analysis should look similar to the Driven line -- high ZDDP oil etc. Driven DI40 holds its viscosity the best of any oil I have ever seen.
IMHO the Audi Q7 and A5 need Driven DI40 more than any other engines I have experience with. I ditched Castrol literally the day my CPO expired on my 2014 Q5 2.0T, drained it all out and put in DI40. If your Q7 is a 3.0T and the A5 is a 2.0T they are both using a slotted oil control ring and piston design with drain back holes that can and do get clogged with soot/carbon. I have been able to escape this at 120K miles using DI40 at short OCIs miles but IMHO controlling soot is the #1 priority on a DFI engine. It causes timing chains to stretch and cakes on the rings which inhibits them from being able to expand the way they need to for good ring seal.... and it is what causes oil to come out after just 1-2K miles looking black as night.
IMHO the Audi Q7 and A5 need Driven DI40 more than any other engines I have experience with. I ditched Castrol literally the day my CPO expired on my 2014 Q5 2.0T, drained it all out and put in DI40. If your Q7 is a 3.0T and the A5 is a 2.0T they are both using a slotted oil control ring and piston design with drain back holes that can and do get clogged with soot/carbon. I have been able to escape this at 120K miles using DI40 at short OCIs miles but IMHO controlling soot is the #1 priority on a DFI engine. It causes timing chains to stretch and cakes on the rings which inhibits them from being able to expand the way they need to for good ring seal.... and it is what causes oil to come out after just 1-2K miles looking black as night.
Gotta agree with you. While I change my oil 2-3 times a year in my Audis, I would like to go to DI40 with both. Now the wrestling match starts with the dealer and CPO.
Thanks for posting this. I knew Castrol was using Titanium, I do see see that in the sample, and no moly.
One thing I find interesting about the Millers is it seems to use up the Moly pretty quickly -- I do not see such a sharp reduction in moly in my DI40 samples vs virgin. You can see the DI40 has much higher viscosity.
Do you know why the 6/3/22 Millers sample with 0 miles has 20 ppm tin?
Also what caused your fuel dilution to drop so much between Test 1 and 2? I am assuming the engine refresh and you got new injectors? Thanks for posting this information.
Probably tested better due to new fuel injectors, but i also replaced my IMS Retro, RMS, spark plugs, ignition coils, maf, oil cooler, and replaced my failed Motorsports AOS with the UAOS track, as well as a boatload of other things I can't remember as I write this.
No idea about the tin. May be an anomaly or due to a change in Millers formula. DI40 test after my track day came back with normal readings. But I'll keep an eye on it, which is the great thing about these tests.
I just talked to Lake. The oxidation value of 40.0 above is NOT correct and was a mistake (it should be more like 5.0), he told me it is the value for DT40.
In light of this information this makes a lot more sense as I was very confused after Charles said DI40 has no ester but i saw such a high oxidation value. What I find fascinating is that due to their lack of polarity usually PAOs require a co-base stock like an ester to hold additives in suspension -- how that is achieved with DI40 Lake told me is their trade secret (makes sense). Hats off to Lake for literally responding to me 3 minutes after I emailed him. That dude is one Hell of a nice guy.......
Also GC996 thank you for posting the virgin reports including DI40 which helped me to detect this error (was wondering why they were so much different for oxidation).
This video explains how DI40 holds its viscosity so well. Because it is mPAO, a polyalphaolefin (PAO) catalyzed with metallocene (mPAO) that results in a very homogenous chemical structure yielding several advantages. With Boron Trifluoride catalysts for example they don't have control over where each Carbon ultimately connects in the backbone structure -- and this leads to an irregular branch structure with more double carbon bonds. But when the metallocene catalyst is used instead you can see the resulting branch structure is very regular and therefore mPAOs will have almost no double carbon bonds (single carbon bonds are more stable and therefore desirable) because they are easily saturatable and are homogenous. This results in various advantages including a higher viscosity index, excellent oxidation stability, lower traction coefficient, and less foaming/volatilization. Oil is just chemistry.
I'm driving myself insane in trying to decide to make my next oil change Driven DT40 or Liqui Moly Leichtlauf, anyone have a virgin sample of Liqui Moly Leichtlauf?
I'm driving myself insane in trying to decide to make my next oil change Driven DT40 or Liqui Moly Leichtlauf, anyone have a virgin sample of Liqui Moly Leichtlauf?
Nothing better than a Speednostic 3 pack and a few more virgin oil tests. DT40, Liquid Moly and pick one more! Love to see more guys do it and post here. We can all use the info.
Nothing better than a Speednostic 3 pack and a few more virgin oil tests. DT40, Liquid Moly and pick one more! Love to see more guys do it and post here. We can all use the info.
you know, what I might have to, I haven’t been able to get a straight answer about moly content. I have molygen for my S4, Mobil 1 5w-40, might buy Porsche Classic 5w-50. Might swap the Mobil 1 for Motul X-cess 5w-40.
06-26-2023, 07:20 PM
