After the cylinders are cleaner than clean, I apply a thin film of 30w using my hands (no lint!). I lube the piston pins well & then a dab of the oil on each piston skirt, that's it...send 'em home.
I used to completely immerse the pistons & rings in oil before installation, but I decided it was too much. Probably doesn't matter either way, really, since most excess oil will end up in the pan after an hour or two anyway.
Fuel & Brake Systems Engineer
"I can live with doubt and uncertainty and not knowing. I think it's much more interesting to live not knowing than to have answers which might be wrong." - Feynman
"Good data is precious. The problem I have is when some damned fool fails to use it properly." - Slingerland