There was a thread here a while back discussing automatic oiling systems. Below is a thread showing what I've done for mine. It will be 100% automated, based on spindle on-time, with the quantity of oil being delivered to each oiling point during each cycle being software selectable, so no worries about over- or under-oiling any circuit(s). All the goofy (and unreliable) flow-control/check valves are eliminated, making the system very reliable.
http://www.cnczone.com/forums/novako...tic-oiler.html
Regards,
Ray L.