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I built one with a $100 harbor freight a/c vacuum pump and an old mini compressor air tank. I use it to suck the oil out of differentials and small engine oil changes. One of the handiest tools I've got. If you build one make sure you put a clear see through filter on the tubing to the pump so your pump doesn't get contaminated. Good luck!

I might be dumb...gravity and ramps does the work for me.

I might need a ELIR for oil exchange vacuum.

I have one very much like the latter one you posted. I can hardly believe I ever did oil changes any other way. I mean, it's the only way to get the oil out of the boat's engine, and it makes changing the oil in the cars a whole bunch easier as well. I've had it for almost a decade now, and I just wish I bought more of them while they were still cheap.

The electric one sounds interesting, but how lazy can a guy get?

Started using extractors when personal watercraft went to 4 stroke engines and no drain plug.
Bought a larger one with wheels to use on my personal vehicles. They work well on my specific vehicles. Warm up the engine and slide the tube down the dipstick sleeve, you may have to raise and lower the suction tube to make sure its all out.
My extractor has a sight glass so I can verify how much oil I removed. Another bonus is that it holds 6.5 gallons and can easily be poured into containers to be disposed of away from my location, since used oil kills the grass.

No, sorry.

Yep. No need to go under the car for an oil change.

These are required for many boats ... only way to extract oil. But, once you get one it's easier for auto oil changes as well.

You need low-profile ramps:

https://www.amazon.com/low-profile-car-ramps/s?k=low+profile+car+ramps

I'm sending an Amazon link to show them to you, you can get these at most any Auto-parts store. I used to use them with my 325i BMWs that had low a profile they worked fine. You might be able to search by car Make & Model to find specific-fitting ramps based on your cars clearance.

A tube, a vacuum pump and a ball jar is a way to do it. Yours will probably have tighter seals and fewer problems.

Those are pretty much the only way to change the oil on like a personal watercraft or boat

All oil pans are different and the amount remaining after extraction will be unique to the vehicle. That is the most sludgy crap.

I recommend using the extractor immediately upon shut down of a fully warmed up engine and then lifting the car level or tilted towards the drain plug and checking how much was missed by the extractor by removing plug and draining traditional method. If less than a couple ounces, just use extractor next 3 oil changes. Otherwise revert to only drain if you care about the car. Some dipsticks do not locate the lowest point on the pan. Jamming an extractor tube may result in having to drop the pan.

I mention 3 oil changed because many cars have magnetic plugs that lose effectiveness as the filter metal particles. You want to clean this occasionally.

If you've got a boat or industrial engine, or any hydraulic lubricant, without drain plug access, then the correct method would be extraction followed by an additional purge cycle using new oil, heated to operated temperature, and then immediately extracted, followed by the final fill.

I just hook my garden hose up to the oil reservoir and turn it wide open.

auto - why? boat maybe...

Gravity, you dumb liberal inbred fuckwit nigger.

If you want to do a cleaning, replace oil with diesel and run for short time.

Then Gravity, you dumb liberal inbred fuckwit nigger.