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      07-01-2014, 09:24 AM   #331
dparm
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Quote:
Originally Posted by SenorFunkyPants View Post
But it is a trend that is becoming common...a change to 0W40 Mobil 1 is followed by a slight drop in lead and a slight increase in iron.
If the drop in lead is portrayed as a benefit then the increase in iron should draw equal concern. Can't have it both ways.

Until people start running other thinner oils (PUE 5w40, etc), you can't blame it entirely on Mobil 1. I am considering the PUE on my upcoming change.

Some grades of Mobil 1 have shown trace amounts (1ppm) of iron on the VOAs I've looked at.
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      07-01-2014, 09:53 AM   #332
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you can't blame it entirely on Mobil 1.
Hmmm I would have thought you can if nothing else is changed (1ppm trace Fe notwithstanding).
There definitely seems to be a pattern of a rise in Fe with a change to M1.
Not that I'm bothered as I'm sticking with OEM Castrol but if I was considering a switch it would make me nervous. At least the lead bearings can be considered a "sacrificial" part where the Fe is unlikely to be coming from anywhere benign.
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      07-01-2014, 10:46 AM   #333
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Sure it does. The higher VI and better cold start performance is beneficial in any climate. Even though "cold" for you might be 50 degrees, the oil is still VERY thick at that temperature.
True, but TWS hasn't shown any negative effects thus far for my engine, and she's rarely started up unless I take her out late mornings on longer highway trips.
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      07-01-2014, 11:49 AM   #334
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Quote:
Originally Posted by dparm View Post
Until people start running other thinner oils (PUE 5w40, etc), you can't blame it entirely on Mobil 1. I am considering the PUE on my upcoming change.

Some grades of Mobil 1 have shown trace amounts (1ppm) of iron on the VOAs I've looked at.
What are your considerations with the possible switch to PUE? Unhappy with the M1?
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      07-01-2014, 01:22 PM   #335
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What are your considerations with the possible switch to PUE? Unhappy with the M1?
Curiosity. I am interested to see how it holds up for my particular uses. I am also a fan of their GTL basestocks.
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      07-01-2014, 04:22 PM   #336
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I think you're wrong. If you could disclose your oil analysis training, we'll discuss this last leg theory you have.
Yeah, you're right. Your bearings are in fantabulous shape! All that lead in your oil is just materializing out of thin air.

No need to get all Mr. Smartypants with me. If you wanna risk a $25000 engine just to squeeze out a few more months or maybe a year or two out of your clearly used up bearings, that's your business. Just don't try and convince me your bearings are good for another 50k miles or 100k miles with all that lead in the oil.
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      07-01-2014, 04:33 PM   #337
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Yeah, you're right. Your bearings are in fantabulous shape! All that lead in your oil is just materializing out of thin air.

No need to get all Mr. Smartypants with me. If you wanna risk a $25000 engine just to squeeze out a few more months or maybe a year or two out of your clearly used up bearings, that's your business. Just don't try and convince me your bearings are good for another 50k miles or 100k miles with all that lead in the oil.
So you're not trained in oil analysis, enough said.
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      07-02-2014, 05:19 PM   #338
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Just got my second report in. I think the oil in this sample was the revised TWS formula, based on the moly and other metals that popped up (Blackstone states the same thing as well). I also paid the the TBN report, and I think Blackstone forgot to run it. I'll edit the post once I hear back from them.

EDIT: TBN came back from Blackstone and read 4.2. Plenty of life left in the oil.

Lead went down to my surprise, I guess I'll delay my swapping out the old bearings to a fresh 702/703 set with WPC coating I bought last year.


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      07-03-2014, 12:38 PM   #339
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^^^ Good to see another '08 that's healthy. Agree on the moly, I'm thinking Castrol feels it's a very important part of the additive package.
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      07-03-2014, 01:12 PM   #340
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Quote:
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^^^ Good to see another '08 that's healthy. Agree on the moly, I'm thinking Castrol feels it's a very important part of the additive package.

Moly is tried-and-true, but expect to see them shift away from that in the coming years. New stuff like antimony, titanium, and even next-gen basestocks with integrated friction modifiers (FM) will surpass stuff like moly and keep prices down for Castrol.
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      07-06-2014, 09:42 AM   #341
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Quote:
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Moly is tried-and-true, but expect to see them shift away from that in the coming years. New stuff like antimony, titanium, and even next-gen basestocks with integrated friction modifiers (FM) will surpass stuff like moly and keep prices down for Castrol.
This is good to know and I should keep an eye out for more VOAs. I've seen the newer Castrol marketing with titanium, maybe it will make its way into the TWS sometime.
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      07-06-2014, 04:43 PM   #342
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I have since day 1. Until the copper trend rises I don't plan to change the interval.
The high lead levels compared to average is something you should just keep an eye on for now. The levels are DECREASING which is a good sign. Hopefully your next few tests will result in further decreases. The key is the trend over time guys. No need to panic because of one elevated reading.
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      07-07-2014, 05:44 AM   #343
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Quote:
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The high lead levels compared to average is something you should just keep an eye on for now. The levels are DECREASING which is a good sign. Hopefully your next few tests will result in further decreases. The key is the trend over time guys. No need to panic because of one elevated reading.
Yes I am fully aware of trend analysis. I have performed spectrometric oil analysis for the USAF.
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      07-07-2014, 07:41 AM   #344
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Danny, do you post over on BITOG?
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      07-07-2014, 09:58 AM   #345
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Yes I am fully aware of trend analysis. I have performed spectrometric oil analysis for the USAF.
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      07-07-2014, 12:35 PM   #346
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Danny, do you post over on BITOG?
No I don't.
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      07-17-2014, 05:53 PM   #347
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My thoughts:

The M1 0w40 seems to work well for my car, and could've gone much further than 6,000 miles. The iron is slightly elevated but everything else is fine so I agree that it's probably nothing. Considering how I drive the car to redline often coupled with the short-trip nature of my driving, and how high-strung the engine is to begin with, the numbers look good.

Fuel was probably elevated since I didn't drive it very far to get the oil change that morning and it was probably running a tad rich from the aggressive cold-start.

The only reason I changed it was because the CBS indicated I needed a change (it thought this was still the original TWS with 13,674 mi on it). I have opted to do "intermediate" changes at the halfway point between BMW's recommended 15k intervals. At this rate, I will probably change it again in the late winter.
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      07-26-2014, 03:47 PM   #348
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Just had my rod bearings replaced a few weeks ago. This is the oil analysis for the "break in" period.

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      07-28-2014, 06:09 PM   #349
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Mine at ca 17000 miles

My report at the first oil change, post running-in service.

Castrol TWS as per BMW recommendation. Had perhaps 3 top-ups during the period.

Car is 2012 MY and I now intend to go to 7500 mile oil change intervals.

Anyone with the right knowledge to interpret? I am definitely interested!

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      07-28-2014, 10:48 PM   #350
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Tony,

I had an oil report done with about 5000 less miles ( I guess you use miles) on my second change and had just about the same numbers as you. It was changed as a one year service. High iron (23) and copper (19) and a little high aluminum (8). Blackstone also said mine was pretty normal. So I guess we can assume we are pretty normal for new engines on first change after 1200 mile service.

My viscosity was a little lower at 14.82 and I had no oil added before change.
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      07-29-2014, 05:55 PM   #351
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Tony,

I had an oil report done with about 5000 less miles ( I guess you use miles) on my second change and had just about the same numbers as you. It was changed as a one year service. High iron (23) and copper (19) and a little high aluminum (8). Blackstone also said mine was pretty normal. So I guess we can assume we are pretty normal for new engines on first change after 1200 mile service.

My viscosity was a little lower at 14.82 and I had no oil added before change.
Thanks for responding.

So I guess that one learning point here is that more frequent oil changes in the early life of the engine will help to flush out any manufacturing detritus and that has to be a good thing?

Looking at the high silicon value - time to check the tightness of intake trunking downstream of the air filter, and maybe the seating of the filter itself.
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      07-29-2014, 11:04 PM   #352
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I missed that silicon; mine was 5. If I remember correctly the silicon can also be from sealant used for assembly. But I would certainly check the intake system as you mentioned.

I didn't do the 1200 miles change oil report but that could be an interesting one. Hopefully the wear metal stuff is small enough to not affect the wear. Sand certainly could cause wear.


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Thanks for responding.

So I guess that one learning point here is that more frequent oil changes in the early life of the engine will help to flush out any manufacturing detritus and that has to be a good thing?

Looking at the high silicon value - time to check the tightness of intake trunking downstream of the air filter, and maybe the seating of the filter itself.
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