Further running is probably not going to improve the valve leaks. Until you get some load on the engine, the ring seating might improve slowly, but nothing seats rings better than some controlled lugging. When the pistons are fighting a load, the combustion pressure gets behind the compression rings and forces them tight against the cylinder walls. That's particularly true of the "low tension" rings that have been the industry standard since the late 1980's. Before that, rings had a lot more spring tension, and combustion loading wasn't as important as it is now.
More lubrication of the rings is just going to prolong the agony- - - - -I'd suggest forgetting about PB Blaster or any other kinds or Moose Juice!
Jerry
