HI all. I made a mistake taking this oils sample was talking to someone when i was planing on taking the UOA.I had the filter its oil and the oil from the sump in the container before i took the test. I am guessing that this will adulterate the results. Does anyone know do the these oil filter catch and keep the particles, do they work like a siv, a paper towel or more sealed then them so that the bits wont go back the way they came from. Could i have let the bits from the filter mix with the oil from the sump and be brought up on the test. I will double check the silicon but this is the second test with this oil using a different that i have a got the same ball park figure for it, 17ppm in the last one so i don't think it is all dirt.