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Rick: I attached my UOA from Blackstone so you could have a visual comparison. This is also using Castrol Edge 10w-40. Everything looks similar except as noted the viscosity which appears to be consistent. A thought I have is that fluid shear can be caused by fluid flow under pressure through an orifice. With this in mind I would wonder if you have changed the oil pressure relief piston? Could be worthwhile and it is cheap and easy.
Last edited by 911monty; 07-20-2017 at 05:51 PM.
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1998 Porsche Boxster
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