first off sorry if I posted this in the wrong section. dont know where to post it. so sorry ahead of time I was wondrting how yo upull your samples. as I was in the Air Force and was a Crew Chief of a B-52H Bomber. I know when we took oil samples we had to go through the oil cap with a tub and go all the way down then bring it half way up. so we could get an accurate reading. I was told draining out the bottom was a no no unless yo ulet the oil set for about an hour I think. been a few years sence I done it. so my question is how do yo uall take your samples. also does it make any difference if the oil is warm or cold? I know by sending it in it will be cold. I am just wondering if it makes a difference or not.