Started with full tanks, reached 9.500 feet, set my power at 21" MaP, 2100 RPM, started leaning until the cylinders said "are you crazy?" then added just a bit to keep the engine running smoothly.

In this configuration, even having about 3-5 kt headwind, the airplane is doing in the neighborhood of 120 knots, burning 5.1 gph, with estimated max range of about 1500 NM. Is Commander THAT fuel-efficient? I'm asking 'cause I didn't consider it a machine capable of flying Japan-US, but now I kinda do