Black Stone Oil Analysis
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Joined: Nov 2009
Posts: 209
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From: SF Bay Area
My Ride: 2005 545i Sport 6 speed Manual
are you using castrol 10w-60 in your 545, same as what is recommended for the m5? i was thinking of switching to mobil 5w-50, but everyone here says that is bad for the engine.
looks like that oil is keeping your metal parts from touching down!!!
looks like that oil is keeping your metal parts from touching down!!!
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Joined: Aug 2008
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From: Originally from Koeln, Deutschland. Enjoying it in Bonita Springs, Florida Now :)
No this is for the M3, I don't recall what oil I used in my 545i....
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Joined: Aug 2008
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From: Originally from Koeln, Deutschland. Enjoying it in Bonita Springs, Florida Now :)
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Joined: Apr 2010
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From: Massachusetts
Yes it looks like Castrol, with the lack of Calcium and high Boron. Only two companies that uses that much Boron is Castrol and Pennzoil Ultra. So your Aluminum is 4@1,000 and 5@2,000 so it seems like your Aluminum is higher if you go by ppm/1000 miles. Obviously Aluminum is not linear as the Iron wear would be in an UOA. What does your owners manual say about the viscosity of the oil? I would try a lower viscosity oil. My personal favorite is Mobil 1 0w40. All the BMW UOA's on 0w40 M1 are generally spectacular. Do you spend much time on www.bobistheoilguy.com?
Thread Starter
Contributors
Joined: Aug 2008
Posts: 7,421
Likes: 0
From: Originally from Koeln, Deutschland. Enjoying it in Bonita Springs, Florida Now :)
Yes it looks like Castrol, with the lack of Calcium and high Boron. Only two companies that uses that much Boron is Castrol and Pennzoil Ultra. So your Aluminum is 4@1,000 and 5@2,000 so it seems like your Aluminum is higher if you go by ppm/1000 miles. Obviously Aluminum is not linear as the Iron wear would be in an UOA. What does your owners manual say about the viscosity of the oil? I would try a lower viscosity oil. My personal favorite is Mobil 1 0w40. All the BMW UOA's on 0w40 M1 are generally spectacular. Do you spend much time on www.bobistheoilguy.com?
