M1 0W/40 6,504 Miles MB S600 (M275 V-12)

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Astro14

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Mercedes Benz 5.5L (M275) V-12 Twin Turbo



Mobil 1 0W/40 6,504 Miles





Previous Blackstone comments:



04/10/13: There's really no bad news to report for this first sample from your S600's V-12. Metals look great

here compared to universal averages, which are based on an oil run just half as long as your sample. Iron is

exceptional considering the longer-than-average oil run, as usually longer runs leave more iron in the oil.

The viscosity was half a shade low, but that wasn't the result of excessive fuel dilution and it's not hurting

anything, so we wouldn't worry about it too much. No water or insolubles were found, and the TBN was solid

at 3.2. Great engine and great report!



05/26/14: Another great report! You pushed a little longer on the oil this time around, so

there were some slight increases in a few metals (chrome, iron, copper), but the

other metals actually improved since last time. Since universal averages are based

on ~4,400 miles of oil use, and you're getting better-than-average wear on a much

longer oil run, we don't see any problems to report here! Your previous sample had

a slightly low viscosity, but that's back in line this time, and the TBN is still

strong at 3.3, so this oil can run longer. Try 11,000 miles next oil. Nice!



Blackstone Comments:



Thanks for the note about the oil life monitor. It looks like it sold you short this time because your

engine's wear metals are close to the same levels we were seeing in the past. Copper was the exception

since it dropped by about 50%, but that's not a metal that should track with oil use, so it's hard to say it read

lower because of the shorter interval. Maybe brass/bronze parts are just wearing exceptionally well now. No

matter, an improvement is always nice. The TBN was strong at 5.5, so try up to 9,000 miles again. The low

viscosity is harmless.





MI/HR on Oil 6,504 9,186 UNIT AVERAGES 8,946 UNIVERSAL AVERAGES

MI/HR on Unit 80,443 73,939 64,753

Sample Date 4/10/2015 05/26/14 04/10/13

Make Up Oil Added 0 qts 0 qts 0 qts



ALUMINUM 4 4 5 6 5

CHROMIUM 0 1 0 0 0

IRON 8 9 8 8 11

COPPER 4 9 7 8 7

LEAD 0 0 0 1 2

TIN 0 0 1 3 1

MOLYBDENUM 90 92 111 149 71

NICKEL 0 0 0 0 0

MANGANESE 1 2 1 1 1

SILVER 0 0 0 0 0

TITANIUM 0 0 0 0 0

POTASSIUM 3 5 4 4 3

BORON 147 96 102 63 117

SILICON 7 4 5 5 7

SODIUM 5 4 6 7 9

CALCIUM 3426 2800 2853 2333 2471

MAGNESIUM 30 32 35 44 37

PHOSPHORUS 943 902 929 942 891

ZINC 1150 1047 1108 1127 1017

BARIUM 1 0 0 0 0



should be

SUS Vis @210°F 64.6 70.6 65-76 64.6

cSt Vis @100°C 11.50 13.12 11.6-14.8 11.49

Flashpoint °F 385 415 >375 395

Fuel %
Antifreeze % 0.0 0.0 0 0.0

Water % 0.0 0.0
Insolubles % 0.2 0.2
TBN 5.5 3.3 >1.0 3.2

TAN

ISO Code






My note to Blackstone was that the OLM won't go over one year, so I changed this run of M1 0W40 at one year...

Clearly, that's far short of the oil's life. It continues to hold up well, as does the engine. I plan to stick with the M1 0W40 for this car.
 
Last edited:
Strange how the longer run maintained viscosity while the shorter run sheared to a 30 weight with the flash taking a hit. I'm assuming that both runs were M1's 0w40.

Great report!
 
Yeah, I thought so too...it was run more frequently during the year with more miles, and it went on some long highway trips, so I wonder if perhaps fuel dilution from shorter trips and more cold starts/mile caused the viscosity to suffer?

It was M1 0W40 for all the samples...and I can't see using a different oil when this one is readily available, reasonably priced, and performs so well...
 
Yeah man, a good report indeed.. And if you want to stretch out its legs run up to Williamsburg for a nice dinner out at the Blue Talon or the Fat Canary.. Best restaurants in this little town
smile.gif
but very very good though
 
Last edited:
Originally Posted By: bbhero
Yeah man, a good report indeed.. And if you want to stretch out its legs run up to Williamsburg for a nice dinner out at the Blue Talon or the Fat Canary.. Best restaurants in this little town
smile.gif
but very very good though


When I first got the car, I took my wife to dinner at Le Yaca in your lovely town. Food was superb, as has been our experience.

But it took two hours to get there (right at 63 miles) because of that awful tunnel and highway in between..and the car used 9 gallons of gas...not the leg stretching I had hoped for...
 
Last edited:
Originally Posted By: webfors
Strange how the longer run maintained viscosity while the shorter run sheared to a 30 weight with the flash taking a hit. I'm assuming that both runs were M1's 0w40.

Great report!


Probably wasn't shear, was likely fuel dilution which would do both of those things.
 
I am starting to think that Mobil 1 0W40 is the top dog in oils. I use it in my 90 Jaguar XJS V12 and the engine is very quiet and smooth running. I have also noticed that the engine runs slightly cooler on this oil...
 
I'm considering getting rid of my CTS-V for a CL600. How has yours been with needing maintenance? I prefer to own cars that I can repair myself.
 
Maintenance is a challenge on the V-12 Mercedes - the engine is a beast, the transmission is tough, but the rest of the car can be problematic. The ABC suspension is frequently neglected, leading to very pricey repairs. The car has fiber optic networked computers. You'll need some real diagnostic tools to truly DIY.

I've had very good luck with mine, but I knew its history from new, and it was cared for. Be very cautious with a neglected Mercedes, you're better off looking for another example...

This guy, HAOZ129, is my hero...read through his adventure in getting an S600 sorted...

http://mbworld.org/forums/s-class-w220/431985-ongoing-maintenance-repair-2003-s600.html
 
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