Do I really need a catch can

[bootlegger]

I’m at 2700 and dip stick oil level has not moved. As OP stated the deposits on the valves are from excessive oil being pumped through pcv. He never stated how many miles he ran on pump before going E85. Corn is not going to carbon coat valves like that detergent or not.

It isn't the corn, it's the corrosion inhibitor used. It is a well known issue in the petrochemical industry, and it does carbon coat the intake valves. https://saemobilus.sae.org/content/2013-01-0893

However, the OP seems to have excessive oil consumption. If it is all being consumed via the PCV system, I would question if the PCV itself has issues.

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[TGGT]

Pics of the inside of my intake mani,As promised. Its kind of hard to see from the pics, but the inside of the manifold was saturated in oil. I took these pictures and then ran a can of sea foam through the engine, and finaly added a jlt catch can. When I have time I'll take some more pics of the valves.

 

[accel]

I've always been a big believer in catch cans. but for anyone thats just not sure. I took these pics of my valves today. My car has no catch can and only 7,000 miles

I owned DI engine once and did not want it again. Pereffed 2017 to 2018.

Based on people's experience catch can helped, but did not eliminate the issue with valves being carbon deposited. Port injection at idle should take care of it.

If you think about it, these deposits eat some horsepower.

 

[Zinc03svt]

Yeah, breathers stupid idea. .

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