Oil Change Sucker

This was inspired by Project Farm.  He does experiments with small motors and often needs to change oil in them. He uses a vacuum pump instead of draining the crankcase. I decided to make one like his, only portable.

I bought a small vacuum pump from Amazon.

I used a small electric brake breakaway battery I had on hand like this one. 
A 1/2 gal Wide Mouth Mason Jar for the used oil...
You'll also need:
About 6" of  1/4" OD copper tubing.
About 24" of  3/8" OD clear tubing
About 5' of  .315 OD hard (ice maker) tubing.

And you can probably take it from here?

If not ---

Cut off about 2" of the copper tubing. The 2 and 4" pieces will be soldered to the Mason Jar lid after you drill 1/4" holes in the lid.

I used a heavy washer for reinforcement but it's not absolutely necessary on the lid. I soldered the tubing to the washer and epoxied the assembly to the lid...'cause I tend to be a little careless and this will give me a little more durability? If you do solder, focus the heat on the copper or you might melt the sealing ring on the cap.

 Use the clear flexible tubing to connect the short copper pipe to the sucky side of the pump. Cut a small piece of the clear flexible tube and use it to connect the hard plastic tubing to the other copper pipe on the top.

Wire up the pump with a switch. I had this lighted switch on hand, but a simple toggle would work just as well.

Stick the hard tube in the fill hole and turn on the pump.

I will make a nice container with a handle for the rig, but for now this plastic box serves the purpose and it's quite easy to manage.

And yes, I do have a larger commercial model for the car and boat, but it's is cumbersome and finniky.