[m9bm]

I couldn't find a dedicated oil analysis thread, so here's one. Post your oil analysis files here for input.
Maybe a mod can sticky and change the title to "Blackstone Oil Analysis Thread"?

Here's mine:



Further notes:
Car is modified with Burger Motorsports JBD tune:
http://www.burgertuning.com/BMW_JBD_...ance_chip.html
Car is not used for any high performance application.

I noticed MPG has not been very good ever since I have owned the car. EPA estimates 23 mpg city and 36 highway. The JBD has been eliminated as a factor as I've removed it for a period of time to check the mpg.

Running all highway, I can only get a maximum of 30 mpg.
All city I can only get a maximum of 22 mpg, with an average of about 19-21 mpg.

Additionally, the previous, and only other owner had accidentally filled the car with regular gas. The problem was repaired, but I am not sure to what extent. I purchased the car at a steep discount along with the BMW 100k powertrain warranty good til mid 2017.

Can you comment on diesel fuel being in the oil? Could it be a bad fuel injector? Could it be related to CBU?

I've included as much information as possible.

[BB_cuda]

I had read for a normal non modified 335D, that there was some post injection. I recall that this fuel was on cylinder wall after combustion was complete and that trace levels could go into the sump. The post injection thing might only be a warmup interval event though. I'm unsure if post injection continues on a warmed up engine. One of the gurus will be along in a minute to support or dispel my post injection guess.

But if this is the case, all unmodified M57 would have your 4% after 8000 miles. That's is combination with only getting 30 mpg on all highway makes me think you fuel is going elsewhere. Seems i recall we had another bay area located owner mad about lower than expected mileage. Do you have significant hills in those highway runs perhaps?

[m9bm]

Originally Posted by BB_cuda

I had read for a normal non modified 335D, that there was some post injection. I recall that this fuel was on cylinder wall after combustion was complete and that trace levels could go into the sump. The post injection thing might only be a warmup interval event though. I'm unsure if post injection continues on a warmed up engine. One of the gurus will be along in a minute to support or dispel my post injection guess.

But if this is the case, all unmodified M57 would have your 4% after 8000 miles. That's is combination with only getting 30 mpg on all highway makes me think you fuel is going elsewhere. Seems i recall we had another bay area located owner mad about lower than expected mileage. Do you have significant hills in those highway runs perhaps?

The 30 mpg rating I got was from a road trip from San Jose to Los Angeles and back.

A/C was off, highway 5 is all flat. I attempted to increase the mpg as much as possible but could not get it anywhere near 36 mpg. This was on stock wheels and tires as well.

I've made the same comments above to Blackstone Labs and will see how they respond.

[crazyinp]

Originally Posted by m9bm

The 30 mpg rating I got was from a road trip from San Jose to Los Angeles and back.

A/C was off, highway 5 is all flat. I attempted to increase the mpg as much as possible but could not get it anywhere near 36 mpg. This was on stock wheels and tires as well.

I've made the same comments above to Blackstone Labs and will see how they respond.

I have done this trip few times. I usually average anywhere btw 32-36MPH with A/C on and doing a "little" above the limit on I5.

[Mik325tds]

Great thread. I was hoping for more people to share their oil analysis. TDI shared his analyses here:
http://www.e90post.com/forums/showpo...1&postcount=10
From what he posted, it seems that fuel content of 2-4% is normal.
BB_cuda is right, the engine does do post injection every warm up cycle in order to get the exhaust up to temp fast. The SCR system needs temps past 150°C in order to work properly. After that is reached post injections only happen during regen cycles for the DPF (about every 400 miles).

As for your fuel consumption, that could very well be CBU. Unfortunately, the dealer doesn't do it under warranty until some of these codes are present:
3FF1 air mass sensor
4595 rough controller Cylinder 6
459B rough controller Cylinder 5
4592 rough controller Cylinder 4
4596 rough controller Cylinder 3
4593 rough controller Cylinder 2
459C rough controller Cylinder 1

Do you know if the engine was run at all after misfueling?

[m9bm]

Originally Posted by Mik325tds

Great thread. I was hoping for more people to share their oil analysis. TDI shared his analyses here:
http://www.e90post.com/forums/showpo...1&postcount=10
From what he posted, it seems that fuel content of 2-4% is normal.
BB_cuda is right, the engine does do post injection every warm up cycle in order to get the exhaust up to temp fast. The SCR system needs temps past 150°C in order to work properly. After that is reached post injections only happen during regen cycles for the DPF (about every 400 miles).

As for your fuel consumption, that could very well be CBU. Unfortunately, the dealer doesn't do it under warranty until some of these codes are present:
3FF1 air mass sensor
4595 rough controller Cylinder 6
459B rough controller Cylinder 5
4592 rough controller Cylinder 4
4596 rough controller Cylinder 3
4593 rough controller Cylinder 2
459C rough controller Cylinder 1

Do you know if the engine was run at all after misfueling?

Unfortunately I do not know. I'm under warranty for quite a while still. I've been hoping CBU problems arise soon. If it does and I get it covered I'll run meth lol.

[m80theWolf]

Originally Posted by m9bm

The 30 mpg rating I got was from a road trip from San Jose to Los Angeles and back.

A/C was off, highway 5 is all flat. I attempted to increase the mpg as much as possible but could not get it anywhere near 36 mpg. This was on stock wheels and tires as well.

I've made the same comments above to Blackstone Labs and will see how they respond.

I made the same run recently, ac off and on, used cruise control between 70-80 mph (75 mph most of the time). Averaged 33 mpg.

Alternately, I made an LA to Santa Barbara highway run, kept it at 60-65 mph (which was painful) but managed 40 mpg

[WreckerX5d]

I posted mine before, but here it is again.

My fuel seems to be below .5%.

The oil is Mobil-1 5w-40 ESP M

[Mik325tds]

Now that is interesting, with 12k miles on the oil? I assume you're doing long drives with very few warm-up phases then?

[WreckerX5d]

Originally Posted by Mik325tds

Now that is interesting, with 12k miles on the oil? I assume you're doing long drives with very few warm-up phases then?

It might've been 11k or so miles, actually. I routinely drive my car for 20 minutes at a time, and also on occasion for 350miles. I drive pretty calm when it's warming up until my coolant temp reaches 160*f, then I drive a bit harder.

[m9bm]

I just noticed that my idtive now says 9000 miles until next oil change. This is impossible as I've only put about 300 miles since it was changed and reset at the dealer..what could this mean?

[glitdi]

Read tons of these analysis's... (hope thats grammatically correct)
You will see higher than normal fuel levels in the common rail with dpf systems due to the fact you have an extra injection cycle that is not detonated and is sent to the dpf in the most indirect manner possible. Cylinder wash down is a part of it unfortunately.
You need to look out for the valuable metals such as copper tin etc.. the cast iron looks normal and higher numbers are normal viscosity is fine nut is one to monitor if your changing oils or running something different.
Dont judge an engine based off of one oil sample base it off of multiple samples.
Things like silica will tell you if your replacing your air filter in a timely manner.
Ash content coolant content and fuel dilution are the ones to keep in mind for head gasket fuel pump and injectors.
Tin, aluminum copper means your engine is sick... If you get higher numbers on these try switching oils before worrying about an engine rebuild. Viscosity plays a big role in bearing failure as well.
Hope this helps everyone dont know how familiar people are with used oil analysis.

[Persian Whisperjet]

This is Rotella T6 right at 8K miles. Granted I was not towing a trainer uphill in a snowstorm, but the TBN is surprisingly high at 8.4. If anyone has thoughts about the high silica number I'm all ears. The only thing that comes to mind is I installed the EGR racepipe and some crud may have infiltrated that way. Also, are other people seeing magnesium levels in this range?

[floydarogers]

Quite different numbers from the OEM. Your Phosphorus is also high, Moly is higher than OEM. Do wonder about contamination, perhaps.

[Persian Whisperjet]

Originally Posted by floydarogers

Quite different numbers from the OEM. Your Phosphorus is also high, Moly is higher than OEM. Do wonder about contamination, perhaps.

Phosphorus looks high and and magnesium looks sky high until you compare them to other T6 samples, then they are right in the center of mass.

[Puerto Rican 335d]

could be low fuel Cetane or cbu but its fishy though

[TDIwyse]

Originally Posted by Persian Whisperjet

This is Rotella T6 right at 8K miles. Granted I was not towing a trainer uphill in a snowstorm, but the TBN is surprisingly high at 8.4. If anyone has thoughts about the high silica number I'm all ears. The only thing that comes to mind is I installed the EGR racepipe and some crud may have infiltrated that way. Also, are other people seeing magnesium levels in this range?

Here was my first T6 sample: http://www.e90post.com/forums/showpo...6&postcount=25

Magnesium looks correct for T6. Not sure on your silica number. Is your air filter seated incorrectly, or damaged? Is the crankcase vapor line damaged, letting unfiltered air into the intake? Do you have a catch can that has connections that aren't fully sealed? Just trying to think of ways you might be getting unfiltered air into the intake...

My UOA's, even with an AEM dryflow filter, have showed really low Si numbers, and I live on a gravel road with lots of dust.

[9krpmrx8]

I just thought I would share my UOA since I have not ran one on this car but I have been using blackstone to test and M1 0W-40 in all of my vehicles for a years.

[dmanb2b]

Originally Posted by 9krpmrx8

I just thought I would share my UOA since I have not ran one on this car but I have been using blackstone to test and M1 0W-40 in all of my vehicles for a years.

Nice analysis, but you posted this in diesel forum

[9krpmrx8]

Oh shit, Thanks for pointing that out.

[dmanb2b]

Originally Posted by 9krpmrx8

Oh shit, Thanks for pointing that out.

No worries...I was just getting all confused reading it until I caught it was from a 335i

[Mik325tds]

Bringing this old thread back to life because I think it is good reference data. Here's my most recent oil analysis. Silicon is high because I recently changed my VCG (hopefully). The engine is now at 156k miles.

Admins: Sticky recommended.