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      04-01-2020, 10:09 PM   #1
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Factory oil was 0w20 in my 20 x5
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      11-10-2020, 11:57 AM   #2
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How do we interpret this test result?
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      11-13-2020, 06:08 AM   #3
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same here i'd love someone to decode this analysis..

mainly, was it worth chaning oil after the break in period ?
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      11-15-2020, 02:04 AM   #4
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The TBN (total base number) is a bit low for only 1500-miles. https://www.blackstone-labs.com/do-i-need-a-tbn/

Many oils start out with a pretty high value. Not knowing what the oil BMW uses, this could be normal. From what I think I know, it looks like things may have been a little loose, and the TBN buffer got used up. This can happen as the rings get polished to the cylinders, and stop any blowby of exhaust gasses that can introduce acids, that the TBN buffers. You never want the TBN to get negative in an engine. Higher pressure from higher rpm before the rings fully seat could cause that to drop faster than normal.
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      11-15-2020, 08:13 PM   #5
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Quote:
Originally Posted by jad03060 View Post
The TBN (total base number) is a bit low for only 1500-miles. https://www.blackstone-labs.com/do-i-need-a-tbn/

Many oils start out with a pretty high value. Not knowing what the oil BMW uses, this could be normal. From what I think I know, it looks like things may have been a little loose, and the TBN buffer got used up. This can happen as the rings get polished to the cylinders, and stop any blowby of exhaust gasses that can introduce acids, that the TBN buffers. You never want the TBN to get negative in an engine. Higher pressure from higher rpm before the rings fully seat could cause that to drop faster than normal.
Sooooooooo does that more or less mean its beneficial to do an oil change after the break in?
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      11-15-2020, 10:27 PM   #6
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Today's oils have more additives in them than just base oil. TBN is a measure of how well it can neutralize acids. Some combustion byproducts can be acidic. If those get into the oil, they need to get neutralized or they can start to eat the metals. I'm surprised that the value dropped that low after only 1200-miles. But, as the description I linked, it can drop fast, then plateau. There could be other bits in there that help. So, basically, I don't know. Another test at say 3000-miles would be instructive, but the OP may have changed the oil at that point, and it's mute. I haven't tested in a long time. But, I've seen higher TBM values after 12K-miles than that 1200-miles. SO, I'm somewhat wondering if it was accurate. It would be interesting to know what the TBN value of virgin (unused) oil was. My expectation is that BMW knows their engines, and it may be that the M-versions call for an oil change that early, and if so, sounds like a good idea! That may not apply for their 'normal' engines, assuming people abide by the break-in suggestions FWIW, I've tested some oils at 12k+ miles, and they were still in fine shape, TBN good, wear metals low, viscosity within range. BMW engines tend to use more oil than many others, and that helps. Synthetic oils can handle heat better than conventional ones, and, if you don't use up all of the additives, they can last a very long time.
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      07-03-2022, 04:55 AM   #7
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Quote:
Originally Posted by jad03060 View Post
Today's oils have more additives in them than just base oil. TBN is a measure of how well it can neutralize acids. Some combustion byproducts can be acidic. If those get into the oil, they need to get neutralized or they can start to eat the metals. I'm surprised that the value dropped that low after only 1200-miles. But, as the description I linked, it can drop fast, then plateau. There could be other bits in there that help. So, basically, I don't know. Another test at say 3000-miles would be instructive, but the OP may have changed the oil at that point, and it's mute. I haven't tested in a long time. But, I've seen higher TBM values after 12K-miles than that 1200-miles. SO, I'm somewhat wondering if it was accurate. It would be interesting to know what the TBN value of virgin (unused) oil was. My expectation is that BMW knows their engines, and it may be that the M-versions call for an oil change that early, and if so, sounds like a good idea! That may not apply for their 'normal' engines, assuming people abide by the break-in suggestions FWIW, I've tested some oils at 12k+ miles, and they were still in fine shape, TBN good, wear metals low, viscosity within range. BMW engines tend to use more oil than many others, and that helps. Synthetic oils can handle heat better than conventional ones, and, if you don't use up all of the additives, they can last a very long time.
Some quality information here!
What do you do for a living?
I tested several motors oils over lifespan, all with Blackstone. Figures can float, and as mentioned without brand new oil test as reference, can be hard to read on first test.
Also note to those who like to change runin oil faster than recommended by OEM, I have seen Audi v6 engine consuming oil just because ring's did not seal all the way till 60k miles. Owner changed oil at 1000 miles, when new. What did not help, motor was connected to CVT and run at very low RPM mist of its life.
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      07-26-2022, 06:29 PM   #8
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FWIW, I retired from the defense industry, but have a somewhat technical background.

I did a bunch of oil testing back when I had an Infinity...they recommended oil changes (not synthetic) at 3750-miles, which I felt was way too often. After testing the oil, I found that was true. Then I switched to synthetics, and found that I could get the same level of protection after 3-4x the life as with the OEM suggestions with fossil fuel based oils, which saved not only money, but time and hassle. I only did a couple of tests on my BMW, but found it was still easily within normal specs after the CBS logic's limits. Since I retired, I don't get anywhere near the max miles before the annual timer expires, so I don't worry about it.

There will tend to be a higher accumulation of wear metals in the first oil service interval, but as long as the TBN and viscosity are good, no problems. The engine will have some wear metals as things seat themselves, then things stabilize.
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      09-27-2022, 08:54 AM   #9
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Here's mine, 2019 X5 xDrive50i.
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      09-29-2022, 09:39 PM   #10
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Originally Posted by Two4me View Post
Here's mine, 2019 X5 xDrive50i.
How many miles on that sample?
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      10-06-2022, 05:23 PM   #11
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This is a fresh sample of bmw oil 0w20 sent to the lab . The second oil sample is bmw 0w20 Current mileage 5100 lots of idling time . I choose to do a oil change myself will let the dealer do next oil service at approximately in 4800 miles I believe I'll be doing the oil change every 5000 miles. Due to the low TBN I would say 7500 would be the limit on the BMW oil
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      10-22-2022, 04:11 PM   #12
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How many miles on that sample?
It shows it on the left, it's about 10,000 but i am not exactly sure since it was changed at the dealer before we got the car.
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      02-19-2023, 12:29 AM   #13
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Quote:
Originally Posted by Ftpohyeah View Post
Factory oil was 0w20 in my 20 x5
My tbn is 1.8 in 5,300 miles on my x5 . I don’t think I’ll be doing a 10,000 mile oil service.tbn on a new sample starts 6.5 In the future I’ll be doing 6 months or 5,000 miles . I do the oil service myself anyway hate going to dealer if I don’t have to .
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      02-22-2023, 10:27 AM   #14
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Quote:
Originally Posted by swainbmw View Post
My tbn is 1.8 in 5,300 miles on my x5 . I don’t think I’ll be doing a 10,000 mile oil service.tbn on a new sample starts 6.5 In the future I’ll be doing 6 months or 5,000 miles . I do the oil service myself anyway hate going to dealer if I don’t have to .
Oh wow! That's actually not too low, technically, BUT I'm with you, that feels low to me too, especially for 5,300 miles. I wish Amsoil made oil for these engines, but they got nothing. What oil did you use?


G05 50i too? 2019 or M50i?
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      02-23-2023, 12:34 AM   #15
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Quote:
Originally Posted by Two4me View Post
Oh wow! That's actually not too low, technically, BUT I'm with you, that feels low to me too, especially for 5,300 miles. I wish Amsoil made oil for these engines, but they got nothing. What oil did you use?


G05 50i too? 2019 or M50i?
Bmw oil
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      02-23-2023, 02:23 PM   #16
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Quote:
Originally Posted by swainbmw View Post
My tbn is 1.8 in 5,300 miles on my x5 . I don’t think I’ll be doing a 10,000 mile oil service.tbn on a new sample starts 6.5 In the future I’ll be doing 6 months or 5,000 miles . I do the oil service myself anyway hate going to dealer if I don’t have to .
I am with you. Looking at this, the most I will go is probably 7500. But this messs up the schedule. I will also do it at 5000, 15000, 25000, and let dealers do 10000, 20000, 30000. After, i will check oil analysis and see if I keep the 5000 or switch to 7500.

Doing oil change at home with such a high clearance car is a walk in the park, much eaiser than make an appointment and drop car off to dealer, then pick at the end of the day. And DIY oil change is very inexpensive too. FCP Euro even life time warranty the material on your 2nd purchase. No reason not to do it IMO.
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      02-25-2023, 12:29 AM   #17
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Originally Posted by eelnoraa View Post
I am with you. Looking at this, the most I will go is probably 7500. But this messs up the schedule. I will also do it at 5000, 15000, 25000, and let dealers do 10000, 20000, 30000. After, i will check oil analysis and see if I keep the 5000 or switch to 7500.

Doing oil change at home with such a high clearance car is a walk in the park, much eaiser than make an appointment and drop car off to dealer, then pick at the end of the day. And DIY oil change is very inexpensive too. FCP Euro even life time warranty the material on your 2nd purchase. No reason not to do it IMO.
Yes, FCP free oil I’ll go 6 months or 5,000 miles but if I don’t drive it in winter so I’ll be lucky to do 5,000 miles a year
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      02-28-2023, 05:57 AM   #18
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Quote:
Originally Posted by Two4me View Post
Oh wow! That's actually not too low, technically, BUT I'm with you, that feels low to me too, especially for 5,300 miles. I wish Amsoil made oil for these engines, but they got nothing. What oil did you use?


G05 50i too? 2019 or M50i?
Amsoil does have 0w-20 oil that meets BMW specs. I copied below from the product page. Bottle has a green top and has the BMW spec actually on the front of bottle.

0W-20 (AFE): API SN-PLUS (Resource Conserving); SN,
SM...; ILSAC GF-5; ACEA C5; A1/B1; BMW LL-17FE+; MB 229.71; Ford WSS-M2C947-B1; Opel/Vauxhall OV0401547; Fiat 9.55535-GSX; Chrysler MS-12145; Volvo VCC RBS0-2AE
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      02-28-2023, 06:55 PM   #19
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https://www.amsoil.com/p/sae-0w-20-l...motor-oil-afe/
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      03-03-2023, 10:20 PM   #20
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TBN is a useful number, but modern oils and engine design often result in lower numbers without the associated problems it used to indicate. What's missing from that report posted above is the TAN value, which is very useful in combination with TBN. Those values along with the bearing metals are needed to help figure out when to change the oil. Note that the capacitance, that the BMW oil life sensor reads, is a good way to decide when those values are approaching a problem level. TBN is no longer as critical a number as it used to be with looser original systems, higher sulphur levels in the fuel of old, and the stability of a synthetic oil versus a conventional one. https://www.chevronlubricants.com/en...bn-vs-tan.html
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