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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N47 and N57 Turbodiesel Engine / Drivetrain / Exhaust Modifications > N47 used oil analysis w/ TBN
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      06-13-2019, 05:44 PM   #1
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N47 used oil analysis w/ TBN

Oil is newer spec BMW LL-12FE 0W-30 changed at the dealership, i'm guessing the paper that was found in the oil came from them as the sample was taken from a new bottle mid drain. TBN surprised me, that's pretty good for 5,000 miles, meaning it could do 10k+ no issue.

Additive explanation:
Molybdenum & zinc found in the oil are anti-wear additives
Calcium & phosphorus are the detergent additives
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      06-13-2019, 06:34 PM   #2
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That also confirms that LL-12FE is a lighter weight oil than LL-04. Viscosity numbers for LL-04 are 57-65, and 9.4-11.9.

At 5k mi wear, your LL-12 was already lighter than the minimum LL-04 spec.
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      06-13-2019, 06:39 PM   #3
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Quote:
Originally Posted by FaRKle! View Post
That also confirms that LL-12FE is a lighter weight oil than LL-04. Viscosity numbers for LL-04 are 57-65, and 9.4-11.9.

At 5k mi wear, your LL-12 was already lighter than the minimum LL-04 spec.
What grade of LL04? I thought LL04 that BMW ran was 5w-30?

I'm currently running Pennzoil 5w-30 LL04 and will do a test on that too in about a month.
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      06-13-2019, 06:45 PM   #4
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Originally Posted by 328dX View Post
What grade of LL04? I thought LL04 that BMW ran was 5w-30?
5w-30 LL04, but it shouldn't matter since both 0w-30 and 5w-30 are 30 viscosity at 100C. Clearly one is "less" 30 viscosity than the other...
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      06-13-2019, 06:50 PM   #5
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5w-30 LL04, but it shouldn't matter since both 0w-30 and 5w-30 are 30 viscosity at 100C. Clearly one is "less" 30 viscosity than the other...
True but when i drain a 0w-30 vs 5w-30 the 0w-30 always looks thinner so it's no surprise to me, same goes for 5w-30 vs 10w-30
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      06-13-2019, 07:01 PM   #6
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Originally Posted by 328dX View Post
True but when i drain a 0w-30 vs 5w-30 the 0w-30 always looks thinner so it's no surprise to me, same goes for 5w-30 vs 10w-30
So if your oil's viscosity doesn't fall within the SAE spec for that weight oil you're fine with it?
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      06-13-2019, 07:13 PM   #7
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So if your oil's viscosity doesn't fall within the SAE spec for that weight oil you're fine with it?
No, I'm saying it's always been common sense to me that a 0w-30 will be thinner than 5w-30 at 210F based on what I've noticed over hundreds of oil changes.

I always drain hot and a 0W-30 it always visually thinner than 5w-30, i'm not ok with it, hence why i always do 5k intervals.

Even cold flow is visually noticeable, you pour in a 0w-20 it's thinner than 0w-30, they're both 0w oils cold. I don't understand how the scale works or what the tolerances are.


Lastly, I always prefer 5w-30, I'm in california just like you, 0w-30 is unnecessary, but my oil changes are free until 75k miles, and I go in just to get it documented for carfax and BMW maintenance records
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      12-19-2020, 09:05 PM   #8
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FaRKle! 328iX - my first post-warranty oil change is coming up on MY2016 F25 28dX.

While the manual calls for 0W30 LL12FE, it is my understanding that 5W30 LL04 would be better choice for N47 engine that never see ambient startup temps below 0C.

Did I get it right?
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      12-20-2020, 12:52 AM   #9
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FaRKle! 328iX - my first post-warranty oil change is coming up on MY2016 F25 28dX.

While the manual calls for 0W30 LL12FE, it is my understanding that 5W30 LL04 would be better choice for N47 engine that never see ambient startup temps below 0C.

Did I get it right?
Yeah I would agree. If you're in a warmer climate that's what I would prefer.
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      12-20-2020, 11:14 AM   #10
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was your EGR cooler replaced under the recall?
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      12-21-2020, 08:58 AM   #11
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Will provide my report to the greater community. I run LL12 FE 0W-30 oil currently and have done so since new. Car has 52K miles. Report was run at 49K miles at roughly 9,950 miles on it. Climate in Central MS is quite hot most of the year, but frequently drops to below 0C in winter with infrequent lows between 0C and -10C. Hardly any snow, 0 to 1 day a year.

I am pretty happy with my report after 10K miles. The engine is tolerating well. My car is a garage queen that gets about 15K miles a year, most of it Interstate driving. No heavy driving, I do sometimes haul a trailer from HD or Lowe's. This oil probably had more trailer use than average. If you do spirited driving or track use, you would have to use LL04 for better protection. For me, LL12 checks all boxes and the report put me at relative ease. There is always a give and take with that decision.
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      03-02-2021, 07:35 PM   #12
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I been having high sodium in my oil results... has anyone else have this issue?
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      03-03-2021, 09:25 AM   #13
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Pretty good results, thanks for doing UOAs and posting them! I typically only see UOAs at bobistheoilguy, not expecting to find them here.

I'll be curious what @328iX finds out on the PP Euro L stuff, since I've used that oil before. Currently running Motul X-Clean+
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      03-03-2021, 10:41 PM   #14
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Pretty good results, thanks for doing UOAs and posting them! I typically only see UOAs at bobistheoilguy, not expecting to find them here.

I'll be curious what @328iX finds out on the PP Euro L stuff, since I've used that oil before. Currently running Motul X-Clean+
Sold the vehicle a long time ago sadly, currently have a N20 .
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      03-04-2021, 09:26 AM   #15
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Sold the vehicle a long time ago sadly, currently have a N20 .
Boo! J/K

I take it you're not enjoying it as much as the diesel then?
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      03-04-2021, 12:14 PM   #16
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Quote:
Originally Posted by 328iX View Post
Sold the vehicle a long time ago sadly, currently have a N20 .
Boo! J/K

I take it you're not enjoying it as much as the diesel then?
I enjoy the engine more, higher redline, more power, etc.

What sucks is I feel it's more unreliable, timing chains already replaced at 40k, turbo went out at 35k, valve cover leak at 35k, direct injection pump replaced at like 45k.

Also mpg went down from 34-36 or so in the diesel to 24-26


Thankfully most of it was under warranty but now I'm skeptical lol.

They both had transfer case replacements tho, my diesel and gas.
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      03-05-2021, 10:00 AM   #17
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Indeed, the transfer case plagues many X models, but especially the diesels due to the extra vibration harmonics. So far so good on the original TC in mine.

Other than maintenance, my X3d has been very reliable with no unscheduled repairs.

The fuel economy was the main reason I bought it since I was doing a 200 mile daily commute pre-COVID.

In my neck of the woods, diesel BMWs are unicorns. I haven't seen another except very rarely, on road trips.
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