2011 135i factory fill oil analysis 1300 miles

[JHZR2]

This is the factory fill for my BMW 135i. I have also pasted the VOA of BMW 5w-30 high performance synthetic for reference, though it is not necessarily the FF (though other than the Ca, Id almost say they were identical). Note the fuel dilution and viscosity loss at such a short interval. Fuel dilution IS severe for NA N54/55 engines and will slowly destroy them, as I griped about for a long time - here is proof positive. The oil chemistry will change, and wear rates will go up with time if this sort of thing is left unchecked. It should be doubly noted that at least 1000 miles of this was sustained driving at temperature, with the oil at temperature, which was 250-260F. The car has returned between 26-33MPG during this time.

The TBN was retained fairly well and the wear did not really suffer, IMO, considering the wear rates for the factory fill at 1300 miles compared to what I have seen and posted as UOAs for breakin oil change results from other vehicles. I have not touched the AF, and I assume the Si is due to gasket materials. I can't say this is very bad, and I will be interested at a longer OCI result when I take one at somewhere around 5000-7500mi.

Oil changing on the car is super easy, though I do miss the dipstick because it would make it easy to use an oil extractor to take a UOA sample in the interrim to track wear rates, etc.

 Sample Date	8/8/10	8/8/10
 Unit Age	0	1300
 Comp Age	0	1300
 Time on Oil	0	1300
 Time on Fltr	0	1300
 Oil Maint.	NA	Changed
 Fltr Maint.	NA	Changed
 Fluid	BMW Syn 5w-30	OEM FF
 Fe	        0	20
 Cr	        0	0
 Ni	        0	0
 Ti	        0	0
 Ag	        0	0
 Al	        1	11
 Pb	        0	0
 Cu	        0	10
 Sn	        0	2
 Si	        5	10
 Na	        7	3
 K	        0	3
 B	        53	43
 Ba	        0	0
 Mo	        145	140
 Mg	        12	20
 Ca	        2051	2972
 P	        797	742
 Zn	        831	808
 S	        N/A	N/A
 Cd	        1	0
 Mn	        0	4
 V	        0	0
 Sb	        0	0
 Oxid(PA)	7	11
 Nitr(PA)	13	
 TBN	        7.76	7.47
 Kv@100°C	12.1	9.2
Fuel	        NONE	1.90%
Water	        <0.1%	<0.1%

[mleskovar]

All direct injection automotive engines have a dilution issue. It will be interesting to follow your wear numbers to see if it's a major problem for the 135.

[JB135MDCT]

Can you speak a little slower. Are you saying that 1.9% of the oil is gas? Can you provide a description list of each parameter?

Great info, can't wait for 5k.

[babyboss]

bit 2 tech stuff 4 me .. can u put this info in simpler terms ??

[mleskovar]

If you are really serious about the health of your engine you should do oil analysis. It takes the guess work out of when to change oil and tells you if any adverse wear is going on. They can even tell you which parts are being affected. There are several laboratories doing the analysis....here's one:

http://www.blackstone-labs.com/

[Alext]

More importantly, how many BMW N54/N55 engines have actually failed or even had their performance noticeably impaired due to fuel dilution of the oil? Perhaps I should go even more to the point: how many have failed due to FOLLOWING BMW's oil change guidelines?

All these figure are very well, but we have to put them into perspective here.

[JB135MDCT]

Originally Posted by Alext

More importantly, how many BMW N54/N55 engines have actually failed or even had their performance noticeably impaired due to fuel dilution of the oil? Perhaps I should go even more to the point: how many have failed due to FOLLOWING BMW's oil change guidelines?

All these figure are very well, but we have to put them into perspective here.

It's a long term issue, we are not there yet.

[Rikx1M]

Originally Posted by mleskovar

If you are really serious about the health of your engine you should do oil analysis. It takes the guess work out of when to change oil and tells you if any adverse wear is going on. They can even tell you which parts are being affected. There are several laboratories doing the analysis....here's one:

http://www.blackstone-labs.com/

I use to work in the Air Force as an aircraft mechanic and we would do SOAP (Spectrometric Oil Analysis Program) oil samples after every flight. The oil was so clean that anything in the parts per million would mean something was wrong. Once I was curious and had my 1985 Mustang GT's oil sampled. Man the numbers were off the charts.....crazy amounts of every type of metal in the car. But I was told that was normal.

I plan on getting my 135's SOAP sample anyday now and see how engine technologies have improved. I'll let you know.

Just thought I'd share that story.

[Rikx1M]

Originally Posted by mleskovar

If you are really serious about the health of your engine you should do oil analysis. It takes the guess work out of when to change oil and tells you if any adverse wear is going on. They can even tell you which parts are being affected. There are several laboratories doing the analysis....here's one:

http://www.blackstone-labs.com/

I use to work in the Air Force as an aircraft mechanic and we would do SOAP (Spectrometric Oil Analysis Program) oil samples after every flight. The oil was so clean that anything in the parts per million would mean something was wrong. Once I was curious and had my 1985 Mustang GT's oil sampled. Man the numbers were off the charts.....crazy amounts of every type of metal in the car. But I was told that was normal.

I plan on getting my 135's SOAP sample anyday now and see how engine technologies have improved. I'll let you know.

Just thought I'd share that story.