M1 15w-50 in a S80 T6 and in a BMW M5

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Thoughts? Blackstone Labs....UOA on Mobil One 15w-50

BMW M5, 1820 miles on the oil sample, 6570 miles on the engine..

BMW M5/ave
Aluminum 6/5
Chromium 0/2
Iron 10/19
Copper 3/10
Lead 3/4
Tin 4/3
Molybdenum 71/58
Nickel 1/9
Manganese 0/1
Silver 0/0
Titanium 0/0
Potassium 0/2
Boron 150/59
Silicon 6/6
Sodium 6/24
Calcium 2824/1758
Magnesium 165/469
Phosphorus 1064/847
Zinc 1238/995
Barium 0/0

SUS@210 81.8
Flashpoint 390
TBN 9.0

This motor was/is driven hard...4000 to 7000 RPMs for long periods of time...:)


Next car...


The Volvo S80 T-6....

Survived 118-110 degree weather at 80 MPH...for eight hours...

3600 miles on the oil....32,000 miles on the car...

S80 T-6/ave

Aluminum 2/3
Chromium 0/1
Iron 5/10
Copper 3/6
Lead 0/3 (yea baby!)
Tin 3/2
Molybdenum 67/38
Nickel 0/0
Manganese 0/0
Silver 0/0
Titanium 0/0
Potassium 0/1
Boron 151/97
Silicon 2/4 (this is AFTER finding a rat nest in
the air box)
Sodium 8/8
Calcium 3440/2127
Magnesium 17/419
Phosphorus 1124/971
Zinc 1295/1134
Barium 0/0

SUS @ 210 85.0
Flashpoint 445
TBN 6.6

The same lot of oil (Mobil One 15w-50) was used in both the Volvo and in the BMW.

Thanks,

Mark

[ August 21, 2003, 02:47 AM: Message edited by: drallen ]
 
welcome.gif


Looks fine, except the viscosity and flashpoint in the M5 seem a bit low... Any fuel dilution?

Doesn't BMW recommend Castrol TWS 10W-60 for the M engines? Or is that the M3 only?

What did the insolubles read for both?

Fantastic numbers on the Volvo!
cheers.gif


Jason
 
The Volvo numbers are definitely great! I guess that engine must use looser clearances in order to get such good numbers with that thick oil. It's interesting to see how the BMW thinned out the same oil so much more in half the mileage though!
 
Look at how much zinc and P? Is this the extra SS system that they are talking about on the product description? Nice numbers!
 
Thanks for your replys....

The Fuel % was
The insolubles for the Volvo was .4 and the insolubles for the BMW was .5

.25 of a quart of make up oil was added to the BMW...

Does this report mean that the BMW "beats up" the oil significantly more than the Volvo?

Thanks,

Mark
 
Yes, it looks like the BMW was harder on the oil, which is surprising--isn't the Volvo a twin-turbo?

But then again, the BMW is quite young, so the engine is still tight. My experience (with the non-M engines at least) is that they don't start to loosen up until 20,000 miles or so. That's when they start to rev REAL nice.

Indeed, nice levels of zinc and phosphorus; the 50 wt oils are exempt from the ILSAC GF-3 limits, are they not?
 
quote:

Originally posted by quadrun1:
welcome.gif

Doesn't BMW recommend Castrol TWS 10W-60 for the M engines? Or is that the M3 only?


The recommendation is for all S54 engines and S62s produced before 3/00 so M5 is probably a newer model.
 
Thanks again for the replies....

On the M5, I drained the factory fill(5w-30) and replaced the oil with the Castrol TWS 10w-60 at 1200 miles. Drained the 10w-60 at about 4000 miles and replaced with the Mobil one 15w-50 and did the UOA.


The reason I tried the Mobil one 15w-50 is that it is a SL oil where the Castrol is a SJ oil and costs $20 a quart at the local BMW shop...

The Volvo is a twin turbo (270Hp) and the M5 is a 400 horsepower V8 with a four valve head and has double overhead cams..:)

Mark

[ August 21, 2003, 02:35 PM: Message edited by: drallen ]
 
You drained the 10-60 after 4k??? Ouch...
thumbsdown.gif


Where are you located...dealer in upstate NY sells 10-60 for $11. Locally I get it for $16 Can...the price isn't too bad...

Nice post though! Thanx for the results! Would be nice to see how the 15-50 compares with the 10-60...next project
burnout.gif
 
Well, my understanding was that the first oil change should be done at the 1-2k mark and then according to the standard 10k mi. interval.

The remark, albeit slightly sarcastic was in reference to draining a $16-20/qt (8-10 qt. capacity) after only 4k....ie. less than half of what it can and was designed to go. Otherwise, it's always great to see the numbers!
cheers.gif
 
Hi, in my experience and can be dangerous to change the factory fill oil before nominated by the manufacturer
This is because some of the Euro factory fill oils - especially synthetics - are especially formulated to enable "bedding in" of the major components
Some of these lubricants have special designations too for that purpose
Regards
 
quote:

This is because some of the Euro factory fill oils - especially synthetics - are especially formulated to enable "bedding in" of the major components

That's what I was told about the synthetic factory fill in my A4 back in '96. Reluctantly I complied...
 
Oh, ok, I see! Dr. T, I wasn't sure what you meant, because it seems that some people here advocate changing the oil every 500 miles or so while the engine is breaking in.. (I think that's a bit overkill, for oilaholics only!
rolleyes.gif
)

From what I've seen, only the "M" cars get an early oil change at 1,200 miles.

The non "M"-cars go the full interval right away, but not because BMW is using any sort of special break-in oil; someone wrote that the N. American BMWs are filled with plain old TXT Softec Plus.

Only the Europeans get the green oil (?!?!)
 
Once again 15W50 did a great job. Especialy in the Volvo. I would suspect that the BMW will fall inline with the Volvo's number once it hits 15,000-20,000 miles.
 
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