Oil thread with Lab Analyst - Page 5 - BMW M5 Forum and M6 Forums
E34 M5 Discussion 1988-1995 Sedan and Touring

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post #41 of 240 Old 24th January 2013, 12:19 PM
MattH
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I should add that my high silicon reading prompted me to change the airfiler. The old filter didnt look too bad but there was a missing clip which may explain some dust getting in. I now have a replacement clip and just need to fit it.
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post #42 of 240 Old 11th February 2013, 10:53 PM
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post #43 of 240 Old 12th February 2013, 01:22 AM
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Got my oil analysis results back from Blackstone today -- Iron was high at 14ppm but all else seemed within normal limits. Comments?
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post #44 of 240 Old 2nd July 2013, 07:57 PM
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Last year, we replaced Castrol TWS for Mobil1 Extended Life 10W60 for RobertK's 1992 E34 M5. After 8267km, this oil was drained and a sample submitted to Blackstone for a UOA.

Copper increased with 128,6% over last time; but the other metals are low enough. Silicon has returned to normal values, but manganese increased sharply, but as this is most likely a part of fuel, this is not of concern.

Too bad that a TBN measurement was not done, but the Mobil's flash temperature tested at 224°C whereas TWS only reached 199°C. This indicates to a lesser oxidation of Mobil1 EL 10W60 compared to TWS 10W60 (for the same mileage). The high amounts of phosphor and Zinc confirms Mobil1's claim of having a high content of ZDDP.

Overall, copper is a concern (bearing-wear or even the brass valve guides); but for the rest a nice report for an E34 M5 with >300k km on the first engine.
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==> MY90 E34 M5 3.6 <==
==> MY85 E28 M5 M88/3 <==

The E34 M5 Alps tour. Sixth edition: 14-17 September 2007
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post #45 of 240 Old 2nd July 2013, 09:31 PM
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^^

So, in your eyes/experience and comaparing these two oils, woudl you say better is the Mobil 1 extended Life?

Euro M3'87 NogaroSilver/Euro E34 M5 '93/Porsche 993 TT 97' Euro/Porsche 993 Carrera 95' Euro/Skyline R33 GT-R
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post #46 of 240 Old 2nd July 2013, 10:00 PM
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Quote:
Originally Posted by DiegoR View Post
^^

So, in your eyes/experience and comaparing these two oils, woudl you say better is the Mobil 1 extended Life?
Same driver, same mileage, same interval, same car.............The differences between the two colums (300091km and 291824km) do not need further explanation; so yes Mobil1 EL 10W60 definitely performs better for S38/M88/S14 and S50 applications.

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==> MY90 E34 M5 3.6 <==
==> MY85 E28 M5 M88/3 <==

The E34 M5 Alps tour. Sixth edition: 14-17 September 2007
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post #47 of 240 Old 2nd August 2013, 04:00 PM
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Hi raymond,
As you seem to know a lot about oil:
what do you think about Motul 300V 15W50 ???
I do use it in my E24 /// M6 for more than 12 years now ( change oil every year / more or less 5000 km/year ) and it doesn't eat even a cl of oil.

Can I use it on a S38 B38 with same utilisation, or better Mobil 1 10W60 ? ( BMW mainteance book says 15W50 )
thanks in advance for your return..


E24 M635CSI 1985
E34 ///M5 touring evo 1995
E46 ///M3 convertible 2005


from M88 to S54: only ///M straight six !
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post #48 of 240 Old 17th August 2013, 12:14 PM
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Ficelle,

I just returned from holidays and am currently picking up my dailky routine, so bear with me for a moment, but I will answer your questions.

Raymond

==> MY90 E34 M5 3.6 <==
==> MY85 E28 M5 M88/3 <==

The E34 M5 Alps tour. Sixth edition: 14-17 September 2007
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post #49 of 240 Old 17th August 2013, 12:34 PM
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Herewith a UOA of my daily car, an E39/2 530i Touring from 9/2003 ! I switched to Castrol Edge professional TWS for its abilities to withstand high temperatures load much better then the factory approved 5W40, conditions that I especially experience during summertime in the Alps.

- Oil was replaced just a few weeks before my summer holidays, so the sample reprecents normal daily use (mostly in and around town)
- TBN is low at 0,3 after 11k km, which prooves that TWS is nearing its end of life after 10k-11k km in nine months
- Fuel content of 1% is explained by a lot of small distances (grocery getting, bringing and picking the kids from their sport-clubs etc).

Please note that TWS still is my first choice for cars that operate their valves with roller guides between the camshaft and valves, such as the M54 / S54.

Lesson learnt for the S38 / M88
- ZDDP elements (744ppm on Ph and 904ppm on Zinc) is definetelly is too low.
- Don't run the engine-oil for too long (9k-10k km) is way too much !
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==> MY90 E34 M5 3.6 <==
==> MY85 E28 M5 M88/3 <==

The E34 M5 Alps tour. Sixth edition: 14-17 September 2007
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post #50 of 240 Old 19th August 2013, 10:08 AM
Ficelle
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Thanks Raymond,

As I am quite "cool" on driving and very precautionous when warming up, I'll go with the Motul 15W50 like for my M88.
and weather here in south France is quite cool even in winter. ( never under +5°C )
I will make the oil change under 7000km anyway witch will be more or less one year use.
I'll make you a return.

PS: can you tell me a contact in the lab you make the analysis ?
Thanks again !!

E24 M635CSI 1985
E34 ///M5 touring evo 1995
E46 ///M3 convertible 2005


from M88 to S54: only ///M straight six !
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