Any lube that is decently thin enough to get inside the rollers, and has a thin application straw, is good enough for me. I have a couple of bottle of Tri-Flow so I use that. I wipe the chain, then apply ONE DROP to EACH ROLLER. One drop'll do ya!

I apply the drops to the rollers along the bottom section of chain between the RD jockey wheels and the chain rings, then rotate the cranks back to move to the next length of chain, which means you have to pay attention where you left off when you move the chain backwards. Let sit a few minutes then wipe. Works great!