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Hell of an idea, would make oil changes quicker and less messy.

These are fumoto or ez-drain valves. Have nothing to do with rednecks. They're popular in jdm scene. Had one of these installed on my ex-girlfriends car. She had to call me while at an oil change place because they couldn't figure out how to work a valve.

Wait, is there a reason we don't do this as a matter of course?

Until it gets flipped on a bit of road debris and your engine dies.

I had a boat once. The engine had an oil drain and fill pump. It was plumbed into the bottom of the oil pan, and ran to a simple, small, and convenient manifold and pump setup. You didnt have to get dirty or anything. You just aligned the manifold properly for your operation, and put the hose in a bucket. Once drained swap two valves (if i remember correctly) and put the hose into the new bottle of oil, which would be sucked out and pumped back into the oil pan. I always said "fuck, that'd be great to install into a car"; along with the remote oil filter assembly. The pain in the ass is getting under the car, not twisting out a plug. This is a solution to a nonexistent problem that could potentially create a much larger problem.

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Not the sort of valve I'd use to replace my oil pan drain plug, but still, I'm curiously impressed. Red neck, or not, this would make the job significantly cleaner as the stream is steady and controlled. I'm not confident it would hold up to f.o.d. impact, but stuff like this does make the job cleaner.