My Blackstone results
#23
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Just trying to think, I'll keep an eye on it, but I somehow regret not getting clevite or King bearings for the longer lasting (as I hear)
#25
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Found this on Bobistheoilguy
"Silver
Due to its exceptional thermal conductivity, it is occasionally implemented as a coating on bearings to help provide minimal friction. However, it is susceptible to corrosion from Zinc-based additives and is not commonly used in the U.S."
Could the Rotella be eating my bearings apart, or am I beng obsessive again?
"Silver
Due to its exceptional thermal conductivity, it is occasionally implemented as a coating on bearings to help provide minimal friction. However, it is susceptible to corrosion from Zinc-based additives and is not commonly used in the U.S."
Could the Rotella be eating my bearings apart, or am I beng obsessive again?
#27
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I'd be curious to see or hear some other guys running the ACL Race and what their readings are. 5ppm could indicate normal wear on the bearings (since there was no increase from last oil change), or it could mean a slow and steady destruction of the bearings as well. If it's the latter, I'd probably rather change them out sooner than later to avoid damaging other components. I might just wait for the next oil change and see what the readings are then.
#29
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But how much of that difference is from the oil itself, and how much from the residuals washing out? I was under the impression that break-in happened quickly, but as I'm seeing more and more blackstones on newer engines, the particles leaving the engine are quite a process.
I should add I also have the FM Oil cooler kit, so that might be retaining some things between changes as well.
I should add I also have the FM Oil cooler kit, so that might be retaining some things between changes as well.
#30
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Called ACL race this morning, finally got a reply. There is no silver in their bearings, and they basically gave me the same information as what's contained on their site in this photo
![](https://www.miataturbo.net/attachments/engine-performance-56/153098-my-blackstone-results-80-zhapalang_acl_bearing_layers_f00586d3abc794e31e421391bca1407a5aaca6cf.jpg?dateline=1445550451)
Layers of an ACL Race Bearing
Based on this and the Nickel contents of both of my Blackstone samples, I would have to assume that the bearings are not wearing down at an abnormal rate. If all of the Nickel somehow got worn away during the original break-in oil change which we ran for about 10 miles, I would have super elevated Copper, Lead, and Tin numbers, but the Tin was also barely present in both samples. I can then only assume the bearings are OK, and that the higher contents of Copper and Lead from last time were break-in on the top layer of the bearing which is now washing away and decreasing.
I guess if I see a spike in the Nickel numbers, I'll know that the bearings are in need of replacement soon. Still not a clue on where the silver came from.
![](https://www.miataturbo.net/attachments/engine-performance-56/153098-my-blackstone-results-80-zhapalang_acl_bearing_layers_f00586d3abc794e31e421391bca1407a5aaca6cf.jpg?dateline=1445550451)
Layers of an ACL Race Bearing
Based on this and the Nickel contents of both of my Blackstone samples, I would have to assume that the bearings are not wearing down at an abnormal rate. If all of the Nickel somehow got worn away during the original break-in oil change which we ran for about 10 miles, I would have super elevated Copper, Lead, and Tin numbers, but the Tin was also barely present in both samples. I can then only assume the bearings are OK, and that the higher contents of Copper and Lead from last time were break-in on the top layer of the bearing which is now washing away and decreasing.
I guess if I see a spike in the Nickel numbers, I'll know that the bearings are in need of replacement soon. Still not a clue on where the silver came from.
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JesseTheNoob
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09-30-2015 02:44 PM