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M2 Technical Topics > Mechanical Maintenance: Break-in | Oil & Fluids | Servicing | TSB | Recalls > VOA - BMW (Castrol) TPT 5W30 LL-01

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      12-17-2021, 09:59 AM   #23
cheerfulman
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Quote:
Originally Posted by edycol View Post
Hmm no Titanium. That is signature additive of Castrol oils.
Good flash point. I wonder what is evaporation loss (Noack) considering flash point? Usually higher flash point indicates lower Noack.
I have a doubt that this test result is very accurate. It looks very different from 0W-30. Also I checked various results of good Castrol oils and most of them have an average flash point, even Supercar 0W-40 that has PAO well above 50%.
Even if BP Castrol makes something extra special for BMW I highly doubt there would be such a huge difference between 0W-30 and 5W-30 in elements (Molybdenum 75 VS 1, Titanium 17 vs 0, Calcium 976 vs 2654, Magnesium 836 vs 17) and flashpoint.
The best way to verify this would be another sample without the oil brand name. Sadly Blackstone doesn't provide "pour point" result and a graph of the spectroscopic analysis.
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      12-17-2021, 10:51 AM   #24
edycol
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Quote:
Originally Posted by cheerfulman View Post
Quote:
Originally Posted by edycol View Post
Hmm no Titanium. That is signature additive of Castrol oils.
Good flash point. I wonder what is evaporation loss (Noack) considering flash point? Usually higher flash point indicates lower Noack.
I have a doubt that this test result is very accurate. It looks very different from 0W-30. Also I checked various results of good Castrol oils and most of them have an average flash point, even Supercar 0W-40 that has PAO well above 50%.
Even if BP Castrol makes something extra special for BMW I highly doubt there would be such a huge difference between 0W-30 and 5W-30 in elements (Molybdenum 75 VS 1, Titanium 17 vs 0, Calcium 976 vs 2654, Magnesium 836 vs 17) and flashpoint.
The best way to verify this would be another sample without the oil brand name. Sadly Blackstone doesn't provide "pour point" result and a graph of the spectroscopic analysis.
Castrol uses different ASTM sequence to determine flash point. VOA flash point or UOA of any Castrol is always in line with similar oils.
BMW always asks blenders that they currently use to blend specific oil for BMW. You won't find any off the shelf Castrol similar to what they make for BMW. That doesn't mean TPT is better, it just means BMW wants certain specific stuff. Their previous TPT 5W30 LL01 was really stout oil, but had mediocre cold performance. It was almost 10W30 oil.
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      12-17-2021, 12:19 PM   #25
cheerfulman
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You probably misunderstood my point, I was comparing new TPT 0W-30 and new TPT 5W-30. They are quite different in Blackstone lab results.
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      12-17-2021, 02:20 PM   #26
edycol
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Quote:
Originally Posted by cheerfulman View Post
You probably misunderstood my point, I was comparing new TPT 0W-30 and new TPT 5W-30. They are quite different in Blackstone lab results.
One is FE another is not. They will be quiet different.
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      12-21-2021, 01:03 PM   #27
cheerfulman
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Quote:
Originally Posted by edycol View Post
One is FE another is not. They will be quiet different.
Forgot about FE, it explains everything.

Btw, found a good example of fully synthetic oil, sadly not for US market and fuel:
Code:
Name					Method		Units	Aral SuperTronic 0W-40
Density @ 15C, Relative	ASTM D4052	g/ml	0.838
Viscosity, Kinematic 100C	ASTM D445	mm²/s	12.8
Viscosity, Kinematic 40C	ASTM D445	mm²/s	75.7
Viscosity Index			ASTM D2270	None	171
Flash Point, PMCC		ASTM D93	°C		244
Pour Point				ASTM D97	°C		max - 60
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      12-21-2021, 06:42 PM   #28
edycol
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Aral always had good oils.
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