Personally, if you aren't a purist, just pull the road draft tube out, and install a pcv system in. No oil dripping out, no worry about what color it is. With pcv, you get all of the contaminants (airborne) out of the bottom of the engine. I have no idea if it prolongs engine life, but never again will you have a dirt magnet that drips oil out of it on your truck. Its on my website.
