So I emptied my catch can for the first time about a week or two ago and without even thinking just dumped it right back into the engines reservoir. It looked pretty clean on top but at the bottom, there was a bunch of blackness that I did not notice until it was pouring into the engine. The amount was very small maybe few, ounces of oil. I probably won't be doing this in the future just to keep it as clean as possible. I was just curious if anyone else has done that without issue or what their experience was and what they do with you guys do with the catch can oil. Thank you.