For my bikes that never see rain I use White Lightning Clean Ride,for my winter/bad weather bike I use Finish Line Wet,and for my bike clinic I use Pedro's ChainJ. I actually picked the ChainJ because it was biodegradable(farmer's markets being green 'n all),but I'm really pleased with it.
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C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Brompton S6L/S2E-X/M6L-X/S12 T Line