Admittedly, I'm pushing my stovebolt harder and longer than most guys but..
FWIW Shell Rotella T 3 15/40 has 1200+/- ppm zddp and similar specs to the Classic Car oil otherwise, maybe a little better on the cold cranking viscosity and is readily available on the road. For me drain interval and high temp stability are important which is why I don't use Valvoline VR-1 anymore. As the video recently posted points out, racing oils are presumed to be drained frequently. I've found that my oil consumption is lower with Rotella than with VR1. VR-1 starts out OK but after a couple thousand miles it goes up to about a qt./800 mi. However, I do use it in my Norton motorcycle.
