I've used a Topsider brand for years. Wouldn't switch back. I doubt there is any difference between it and a normal drain. Either way gravity gets the oil to the bottom of the pan, and it doesn't much matter whether the oil exits a hole, or gets pulled up a tube. An overnight gravity drain will get a bit more out. But a topsider could suck it up too. Depends how fastidious you want to be. Most of us change our oil twice as often as we need to anyway. In my second life it would be a toss-up if I wanted be come back for an easy life as a pampered cat, or an MB diesel in the care of one of our forum members.
