40 K on a 2001 Camaro . Owner had run Valvoline 5W-30 synthetic, and mechanic switched to GC.
Complaints are lower oil pressure at idle and speed, lifter noise, and oil is very dirty at 2K.
My first thought was the GC is cleaning better, and there is some dirt moving off parts.
Owner also said engine ran better with GC, so I wonder if he may have over revved?
Complaints are lower oil pressure at idle and speed, lifter noise, and oil is very dirty at 2K.
My first thought was the GC is cleaning better, and there is some dirt moving off parts.
Owner also said engine ran better with GC, so I wonder if he may have over revved?