This season I ran a new oil in my engine: Z-Alt Muscle Car Oil 10W-30 (W/ Moly infusion and high levels of EP additives (zddp)).
I am very happy with this oil. I believe the engine ran smoother. Definitely no clickety-clack from the valvetrain on start up. Even if the car had been sitting in the garage for some days. Just silence.
After warm up the car also ran considerably cooler than used to (measured by the car's temperature gauge). This "test" is by no means scientific, and not many miles have been covered this season. But for my part this oil is a winner.
Anyone else with experiences with this oil? Maybe for some longer time/more miles?