Years ago, there was an article in Velonews about lubing freehubs. I would take apart the freehub body and replace the pawl spring with a slightly heavier piano wire spring that I bent to fit. I could then use a Freehub Buddy to pump in a light grease (Lubriplate EMG). I overhauled my hubs every 2500 miles and greased the freehub body every other time. It would take a 20 mile ride to loosen up the freehub and it was quiet and smooth.