My /5 is leaking oil from a few oil-pan holes. I've determined this by observation over a period of days. The push rod seals are leaking as well, but there is definitely oil getting past the bolt threads.
I know that the oil pan bolt-holes are "through" holes.
This started recently with a) an oil change, b) a new pan gasket, and c) installation of stainless steel bolts (sequentially torqued in three steps).
I strongly suspect that the new stainless fasteners are to blame; possibly a slight difference in "specifiation" allowing more major-diameter clearance(?).
Has anyone else experienced this situation (leak after stainless bolt installation)?
Two possible fixes:
a) drain the oil, drop the pan, clean holes, reinstall with new gasket using appropriate thread compound on stainless bolts.
b) replace with the original steel bolts (if I can find 'em...) WITHOUT thread sealant, to see if the leak stops with the carbon steel OEM bolts (indicating that the stainless bolts were indeed "out of spec").
c) implement total-loss oil system
d) none of the above