Off Topic - Removing sump oil through the dipstick tube ?

Thanks bursitis :
Myself, I was looking for one more like this and didn't know or forgot what it was called.
1.7gal evacuator with hand pump

The only downside with those systems is the sediment/whatever crap is on the bottom of the oil pan stays there. So its good to do a proper plug drain every now and then just to get rid of sediment

that was my opinion also until i used it for a few years.  if used properly it works just as good as the drain plug in most cases.

check out harbor freight-----https://www.harborfreight.com/search?q=oil%20extractor

Harbor freight made a 12 v model years back and I have used it all the time when changing oil in the 4-wheelers (ATV) no mess no fuss; takes about 4 minutes to suck the oil out when warm which amounts to about 2 gal. If I was doing it on a large piece of equipment I would go with something like the JD which is one of the best made. Of course the size of the dip stick tube might limit how long it takes.

yes you can get them in 12volt or air operated workshop size units. many auto trans dont have a drain bung and its a messy job as you have to drop the pan. the BTR 95le auto trans made for australian ford vehicles didn't even have a dipstick for early 2000's production they soon fitted dip sticks to the next model. to change the trans oil you had to run the engine in neutral and pump in the required amount while the unit pumped out the old oil. cat actually use a similar set up on some industrial engines.

the mate had a incident with a air operated unit at work.
he forgot to de-pressurise it before opening the valve to drain the catch pan (this unit did suction as well as conventional drain bungs) and copped a bath in old oil it even sprayed the roof of the shed 6metres in the air. it was pressure empty to drain the tank. the valves were set "wrong" so he wore it. still lived at home so he rang his mum to bring him a changed of clothes. good thing they have shower facilities at work.

its also possible to extend that drain to a better spot with pipe fittings and some tube i have done that on stationary engines.

Our local Wally World went to evacuating the oil through the dip stick tube for oil changes rather than the drain as it lessened their liability of improperly tightened drain plugs.