Yeah, I'd cringe reading that title as well. Still. A quick question for the maintenance and service/repair community. One of the things I read time and again on the Internet is those that say that, to clean an engine to a spectacular state of cleanliness and de-sludge, is to drain out all the old oil, refill entirely (and this is a part of my question) with ATF, and let it run at an idle until it fully warms up for 15 minutes, or 30, or an hour, no load (again, that a part of my question..) And that the ATF then comes out looking jet black and not the cherry red it did going in, and that the engine then runs phenomenally. My question to you all is simply if this is a real thing, if it is bunk, and if anyone has ever tried, or can verify or de-bunk. Thanks.