So on the Chinese version of BITOG, there are a few threads suggesting that PEA contaminates engine oil
Here's are some photos of
one thread where they say carbon deposits will end up in the oil filter:
Carbon deposit particles scraped off the surface of the old oil filter with scissors
Carbon deposit particles from the oil filter housing cleaned with a detergent
Rub it with your hands, the graininess is obvious, this is the carbon deposits washed down, mixed in the old engine oil
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Here are photos from
another thread:
Test paper oil sample comparison.
"It is suspected that there was a post not long ago saying that there was an engine that used a large dose of PEA, the old engine oil was black, and there were slag on the eyes, hands, and slag (seems like a picture to prove it)!
So I wanted to use a filter paper to filter the oil sample to see what kind of tricks I could filter out.
Regarding the filter paper used: I happened to have a filter paper for hand-ground coffee powder in my hand, so I used it.
I can't find the exact filter pore size, and the more common saying is 30um-100um.
However, 100um is too exaggerated-I tried to insert a copper wire with a diameter of 0.07mm (70um), and it is impossible to leak it."
Filtration is complete. It takes about 16 minutes to filter 25ml of engine oil.
Close-up of the core part of the oil filter paper sample, with frontal light.
A close-up of the core part of the oil filter paper pattern, backlit.