Homemade oil extractor

[chobbs1957]

Question concerning oil-fluid extractors:
I see several on YouTube that either use a home-made or commercial vacuum extractor for pulling oil up through a small engine oil fill tube, works pretty well. Some are powered by an air compressor, and I’ve seen home-made units use a shop-vac.

My question is why not use a fuel-oil electric pump? I could wire one of those up with alligator connectors and plumb it with some ice maker tubing…. I think I’d spend about $35 instead of $90-$150 for a bought unit and less complicated than a $40-$60 homemade unit.

 

[slomo]

Got one off Scamazon for 25 bucks. Has 12v battery leads on it for power. Nice long tube to extract used oil.

 

[GrumpyCat]

My question is why not use a fuel-oil electric pump? I could wire one of those up with alligator connectors and plumb it with some ice maker tubing….

How do you prime it? The store-bought extractors suck oil out, starting with a hose full of air.

Some automobile dip stick tubes are routed to the very bottom of the crankcase pan to facilitate oil extraction. Mercedes-Benz is one I have direct experience with. The large Harbor Freight oil extractor with big steel tank has a hose fitting which exactly fits in place of a Mercedes-Benz dipstick.

On the other hand Ford put a baffle and other obstructions in my 2018 F-150's 2.7EB dipstick. Absolutely can not use an oil extractor on that engine, not on the dipstick tube, not with a tube inserted in the dipstick tube.

 

[Tiger Small Engine]

Question concerning oil-fluid extractors:
I see several on YouTube that either use a home-made or commercial vacuum extractor for pulling oil up through a small engine oil fill tube, works pretty well. Some are powered by an air compressor, and I’ve seen home-made units use a shop-vac.

My question is why not use a fuel-oil electric pump? I could wire one of those up with alligator connectors and plumb it with some ice maker tubing…. I think I’d spend about $35 instead of $90-$150 for a bought unit and less complicated than a $40-$60 homemade unit.

Or buy a Mityvac oil/gas extractor ($100) that you pump by hand, holds about 3 gallons, and will last a long time because it is a well built unit.

 

[slomo]

How do you prime it? The store-bought extractors suck oil out, starting with a hose full of air.

They self prime. Mine works great. I feel lazy as to not having to crawl under the car and dump oil all over the garage floor LOL. Kinda like cheating on an oil service.