[Duken4evr]

So what is pic one of

The 1st pic in my post is a Milwaukee bore scope looking at one crusty intake port and valve. EGR and oil mist create deposits you don't want on your ports and valves. Adding a catch can removes the oil mist, which should reduce this buildup greatly.

 

[Burgess159]

Im guessing I pulled 4-6 oz. or so out of the can this time. Hadn't checked it in 7,500 miles though which is the longest interval I’ve gone between checking.