Bore scoring - images vs reality
Banned
Joined: Sep 2004
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From: California
etching of the surface for the rings to ride in? The bore surface is a matrix of aluminum with particles of harder material, the aluminum is probably etched away to allow the hard surface to interface with the rings, near the bottom of the bore there is no ring touching so no need to etch
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Joined: Sep 2004
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From: California
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From: ATL, GA w/a 996TT
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From: Central MA
The large polished section is where all three rings have touched.
I can see two distinct sections in the small intermediate area. One (the smaller) has had only the oil control ring sliding over it. The other (larger) has had #2 compression and the oil control rings sliding over it. I bet at the top there's a similar kind of pattern.
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Joined: Jul 2015
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From: Halifax, NS. Canada
You are right, I don’t know how you could send used oil in bulk, other than via courier and it would likely cost more than the oil itself.
Nordschleife Master
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From: Zuffenhausen, Georgia
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Well that was unnecessary, stupid question or not. Answer it or stfu. PorscheC2S - I would steer clear of any products like that, at least on these engines. Because it's in oil it has a high probability of going and sticking to places that you don't want it to and creating more issues in the end. You're better off using an oil with high detergent package and changing it more often, like every 3k miles max.
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From: Zuffenhausen, Georgia
Nordschleife Master
Joined: Oct 2015
Posts: 5,723
Likes: 2,291
From: Zuffenhausen, Georgia
If you're suffering mechanical trama like advanced cylinder bore scoring, then the only cure for the problem is by rebuilding the engine with new sleeves. There is no easy fix or magic cure in the bottle. And, a "high detergent" oil will not do anything to help with this problem. If anything, an oil with high concentrations of ZDDP will help mitigate the problem, but it won't stop it all together. Nothing in the store will eliminate it once it starts.