John, this looks to be a heavily modified street legal car that sees hard runs at the drag strip on weekends. The wear metals are extremely low for this type of service, lower than for regular cars at half the oil change interval. I'd say Blackstones analysis and recommendations are right on.quote:Originally posted by johnpr3:quote:This is a blackstone lab report on the 0w-30 Amsoil,that ADF1 calls kool aid.
I'm not sure what makes this oil analysis so special. Show us a trend over time, not a snapshot in time. Did the oil viscosity continue on the low side? Did that cause wear metals to trend up? How can Blackstone recommend pushing the drain interval out to 7500 miles? Based on their UOA the oil viscosity dropped from 10.3 cSt@100C (AMSOIL data sheet) to 8.32 cSt@100C (Blackstone results), also the flashpoint dropped from 446F to 380F. If it was me, I would like to know why that was happening before I tried going further on an oil change.