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Be VERY prepared to change out that non-street stuff FREQUENTLY,..I'm told it has MINIMAL detergents,..(for a racer: not an issue)...for the street, one would go with what IROC described, as those Z/P levels are good to go,....although I've never run VR, I'd certainly take my same empirical approach of oil analysis (UOAs), at various mileages, to see when those levels drop,..particularly, the TBN.
I'm staying with my BP changeouts at 3K (regiously)...
BEST!
Doyle
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Recording Engineer, Administrator and Entrepeneur
Designer of Fine Studios, Tube Amplifier Guru
1989 Porsche 911 Carrera Coupe
25th Anniversary Special Edition
Middle Georgia
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