[Kevin]

Perhaps install a catch can. I installed one on my Mitsubishi Triton diesel (L200) in-between the crankcase breather and intake; works well.

 

[Kevin]

I've used a "ProVent" but I replaced the filter material with stainless steel wool as the original material is too restrictive.
http://direction-plus.com/products/provent-oil-separator-kits/

 

[Kevin]

Provent 200. My research on newtriton.net revealed the restriction issue.