For long drives, 8 and/or 4 using the armrests, or sometimes just 10 with my arm on the window sill. When turning or on a road that's interesting then 9 and 3.
Anyone hand shuffle well? So you maintain 9 and 3 even while turning, mostly used for racing. I can't get myself to do it even on the street to practice for autocross, just feels weird and I hate the idea I may lose track of where the front wheels are pointed if things get a little hairy...