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Old 04-13-2025, 10:10 PM   #1
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What kind of oil is it that contains so much boron and molybdenum? Very unusual. Additive? Otherwise the viscosities should be more or less the same as the fresh oil, or the remaining oil (which is 20% of the total filling quantity) was completely empty!?
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Old 04-14-2025, 12:57 AM   #2
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Originally Posted by 997_986 View Post
What kind of oil is it that contains so much boron and molybdenum? Very unusual. Additive? Otherwise the viscosities should be more or less the same as the fresh oil, or the remaining oil (which is 20% of the total filling quantity) was completely empty!?
It's mentioned in the first post and some of my replies. The reason i drained off some oil to begin with, was to add Liqui Moly Ceratec. The boron oxide and moly is part of the antifriction package in ceratec, that supposedly reduces chance of bore scoring, and reduces metal on metal friction.

The oil itself is a porsche A40 rated oil: mobil1 3000 x1, 5w-40.

The viscositie is somewhat compromised by fuel/gas in the oil according to the report.

Last edited by Petecomplete; 04-14-2025 at 01:00 AM.
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Old 04-14-2025, 01:56 AM   #3
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It's mentioned in the first post and some of my replies. The reason i drained off some oil to begin with, was to add Liqui Moly Ceratec. The boron oxide and moly is part of the antifriction package in ceratec, that supposedly reduces chance of bore scoring, and reduces metal on metal friction.

The oil itself is a porsche A40 rated oil: mobil1 3000 x1, 5w-40.

The viscositie is somewhat compromised by fuel/gas in the oil according to the report.
Looking at the color of that stuff and given that you used two bottles of it, this could explain the look of the oil!
Edit: I read your first post, you said "you made room for Ceratec", I was not aware that it was already in the oil.

Last edited by 997_986; 04-14-2025 at 01:58 AM.
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Old 04-14-2025, 03:08 AM   #4
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Looking at the color of that stuff and given that you used two bottles of it, this could explain the look of the oil!
Edit: I read your first post, you said "you made room for Ceratec", I was not aware that it was already in the oil.
Sorry if this ended up unclear. To clear up:
In first post, there is NO ceratec in the oil. The picture of the oil that people reacted on was just pure used (10h) oil. The ceratec was then added, and car driven to/from work.

Then, the car was jacked up for a second time, and ALL oil was drained out through a sieve and filter cut open. This is when i took the sample (then with ceratec in it). Since there was no metal, oil was poured back in and driven some more. I have now decided to change oil regardless. As my dad said, i really just have the word of last owner that the oil has been changed annually. Car is new to me, this is my first oil change on this one. Before that, when car was in the US, interval was whatever porsche recommended at the time. So there might be all kinds of sludge/residue in there.

Last edited by Petecomplete; 04-14-2025 at 03:39 AM.
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