Ive had an oil seperator on my truck since I bought it, as well as 2 oil breather caps, one on each valve cover, the oil seperator works great, I only get about a teaspoon of oil in the oil seperator in 5000 miles of driving my truck, my truck uses no oil between oil changes either, ive been hearing alot about the mustang pcv valve, so today I bought one, the only difference I could see between the 2 pcv valves is that the mustang pcv valve has a smaller opening in the bottom,( the end that goes into the valve cover) other than that there the same, hopefully it will stop that last little bit of oil from getting into the oil seperator.
