Hi all, I'm about to take the first samples for UOA on the transmission and engine from my 2003 GS430. I'm using a bellows-type container connected to a plastic tube that goes down the dipstick. When I've done this in the past, I extract the sample with the engine hot, but shut down. I'm wondering if I would get a more representative sample if I extracted the sample with the engine running. What I have in mind is to insert only the length of tubing that equals the length of the dipstick, perhaps slightly less. This would ensure that the end of the tube isn't just sucking junk from the bottom of the pan. I'm thinking with the engine running, the oil would be circulating and therefore I would be more likely to get a representative sample. What do you think?