Oil Leak at High RPM

[TheRoaringEagle]

I've been using the same breather for awhile now. I admit that the engine hasn't been revved up to and past 4,000 RPM for a long time, but the breather is open element type so that should be sufficient right?



The valve cover problem before was from the engine being installed roughly and the lip of the cover bent upwards.

I've noticed also there is a fine mist coating of GREASE? It looks like it's suspension lube!? or speedo cable lube?? (It's gray and stainy on my hands, degreaser doesn't work well on it) It's mostly on the driver's side... weirddd, help!