I'm seeing some suspect info here, and let me tell you -- the lightest Mobil 1 synthetic you can get (I got 0W-20 at W-M), applied from an eyedropper-type bottle, will set you up fine. 3-n-1 is less than ideal for bike chains, and I have NEVER, even from Sheldon Brown, heard about an 8-hour drying time. And no, you don't have to 'clean' the chain every time.

I've tried Tri-Flow -- didn't like it. Tried Finish Line -- didn't like it. Tried Pedro's Ice Wax -- sweet, but too short-lived. Tried Giant's 'Liquid Silk', or something like that -- very sweet! But the Mobil 1 has served me well for over a year and a half.