One possibility
Here’s what worked for me.
I wanted to extract a small sample to send for analysis well before I thought I needed to change it. I bought a pump from Amsoil.
Google Amsoil G1206 - I can't post links
It comes with a hose that’s supposed to fit down the dipstick tube and allow you to suck oil out of the crankcase reservoir.
When you purchase an oil analysis kit, you get a bottle that fits the pump which allows the pump to create a vacuum to suck the oil out.
I’m not certain if it’s easy to find a bottle to fit the pump if you’re not going to buy an oil analysis kit, but I’d have to think that it’s got to be possible.
“Easyvac” sells all of that stuff, but you’ll have to buy more bottles than you’ll probably want.
I tried in vain to get the hose down the tube, and at one point, just like one other post indicated, thought that I had managed to jam the hose in such a way that it wasn’t going to come out without breaking apart. But it did come out with the remains of a “kink” where it had obviously doubled up in the dipstick tube.
So I was forced to improvise. I noticed that if I turned the dipstick ¼ of a turn, it did not go down the tube very far, leading me to believe there was some sort of constriction that was similar in shape to the orange tip of the dipstick (i.e. rectangular, and not round or square). I went to the hardware store and got a 1/8” brass tube that with a little effort, got past the constriction. It fit nicely on the hose and I tie-wrapped it in place. I was not able to draw any oil, as there was no suction, because I still wasn’t reaching the oil.
Back to the hardware store. This time I purchased an aluminum tube that was smaller (3/32” I think – I lost the label). Aluminum seemed to flex more which was important because I believe there’s a bend below the constriction. The smaller aluminum tube did get “lower”, just trying it by itself than the brass tube had, but again I had to “work” it down the dipstick tube to get it there. It fit the hose very loosely, so I used 3 tie wraps in hopes that would be enough to allow a vacuum to be created. That did the trick for me.
The aluminum tube was much longer than the dipstick, and I did not shorten it, partly so that it was ONLY the tube (and not the hose and tie wrap) that went down the dipstick tube.
If you end up with a small bottle (relative to the amount of fluid you want to remove), you can break the vacuum by simply lifting the tube up slightly until the end of the tube is above the level of the oil, then you can unscrew the bottle to empty it and repeat the process as many times as you need to. The pump has a ”screw top” that tightens around the hose that you can use to accomplish the same thing.
A 1/8” aluminum tube may work also in that the key may only be the amount of flex it provides versus the brass instead of the diameter being key, I don’t know. It fit the hose much more snuggly, meaning that there was less worry of a vacuum leak at that juncture.
By this time, you may have found something that works for you. But regardless, best of luck.