Just to emphasize what was said above, I chased an oil leak all last season that put oil on the bottom of the pan, the entire length, oil on the head/block interface, oil on the back of front plate, oil on the bottom of the starter and oil on the front of the bell housing. It turned out that the fuel pump was leaking from the pivot pin below my sight line and only at speed. The fan air blew it all over the engine.
