I think a good question to ask is, do you really want to risk agitated sediment and dirty oil being recirculated through the system once they're already in the pan? Are you more likely to remove more sediment from the system by doing it hot and having possibly slighty more sediment remainiing topside and have lesser sediment remaining in the pan at the time of draining? Or, are you likely to get more sediment from the system by allowing hot oil to drain and settle into the pan overnight and then drain it without agitating and redistributing some of that sediment through the system? While this may be a minor issue, the point I'm driving at is possible damage (scoring, sludging, metal shaving deposits) to the engine's surfaces when recirculating agitated sediment using dirty oil. That is, is it worth recontaminating the engine for the sake of loosening some sediment that may be resting in the pan?
I'm assuming adequate, controlled testing has been done to weigh the pros and cons of both methods. My thinking might be that the reason less sediment is in the pan on a "hot, recirculated" drain is because some sediment has been carried topside and remained there. Has testing been done that entails dismantling the engine to see what kinds of deposits are left behind after both methods? Despite whatever testing data has provided for both methods, I'd say a third alternative might be in order. e.g. Let the hot oil and any agitated sediment drain from the engine and into the pan overnight, drain the pan, then spray a degunking agent inside the drain plug hole in an attempt to loosen and flush out as much remaining sediment as possible. Or, if concerned the degunking agent residue might be left behind and negatively affect the new oil, use new motor oil within a spraying device that has a long dispensing tube, and squirt/blast it into the oil pan to help break up, capture and carry away any impurities in the pan before refilling the system with fresh oil. Does the oil pump on this V6 have any kind of screen on the pick-up that sits in the pan? If so, degunking might be a good way to clear obstructions from that screen which will help improve flow/volume through the system.
I'm not trying to debunk/discredit what anyone's saying or trying be sarcastic. I'm just thinking of things since I've been lounging around all day. I see what the guys are saying about sediment, but I'm not sure I agree with possibly recirculating some of that already-settled sediment through the system via the dirty oil that I'm trying to get rid of. It almost seems counter-productive. Is it better to have dirty oil recirculate agitated sediment in order to heat and soften that sediment for supposedly better sediment expulsion? Or, is it better to leave the sediment settled, drain what you can, then let fresh oil with better lubricatiing properties distribute any agitated sediment through the system, perhaps causing less harm to the engine than doing so with dirty oil? I would think new oil would be better at grabbing and carrying away contaminants back to the oil filter than old broken down oil that's getting ready to be drained.
When all is said and done, I don't think it really matters what method is used so long as the oil is changed at regular, reasonable intervals. It all comes down to personal preference and what process you feel better using.