I install the oil pan gaskets with very light coating of the black RTV, then install the pan and all the bolts and just snug them down lightly, so as not to "smoosh" the gaskets out (using the wet RTV like a lube). The next day, I'll tighten them up all the way.
Also, make sure you always have a good constant crankcase vacuum setup. That may just be your problem all along. I can't stand seeing those little mini K&N's on top the valve covers.......
