Catch can worth it?

[jgonza5]

Here are some high resolution pictures taken with a high end borescope. There is a powdery build up along the ports, but not really anything in the valve seat area to impede air flow.

I did both center valves on the front and rear bank. They all look the same.

If these were PFI valves, I'd rate them very good. As DI valves, I don't see any problem. If I had to guess, based on the appearance of the deposits, I'd say this is more likely from the EGR than PCV.

Wow, appears to be only carbon; no sludge buildup.

Interestingly, I came across a BG's Fuel Test page with lots of video involving a new 2010 SHO with borescope images and video chronicled thru 60k mi. Needless to say, from the looks of their borescope videos, they must have been using fuel from a slop oil tank. Their 6k mi images are about equal to yours at 53k. (I guess you can't sell fuel system treatments with clean valves.)

https://www.bgprod.com/bgautotest/blog/about-the-test/

I also question BG's reported dramatic mpg loss too.

 

[Johnbigdog]

, I'd say this is more likely from the EGR

Our cars dont EGR.

 

[Joshw0000]

I get a small amount of oil from mine with every oil change (5w30 full synthetic Mobil 1).

Sent from my SM-N960U using Tapatalk