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Hello everyone. Usually people change oil in an F Type with a manual extractor like a Mityvac. I was wondering if anyone has tried changing oil using one of those 12v oil extractor pumps? If you have is it effective? Would appreciate any thoughts on this.
In the 4 oil changes I've done now on this platform I've used this hand pump from Harbor Freight. It has the oil completely out in 5 minutes (or less). The pump is so cheap ($7.99) I buy 3 at a time. When I'm done suctioning out the oil I throw the pump away. Not that it's bad, just so cheap not worth leaving it around and just use another new one. This pump works on a whole bunch of stuff not just oil.
The orange hose in the HF kit is too large in dia, so I use a small piece of smaller dia tubing that fits tightly inside the orange tube and tightly onto the oil suction tube on the engine. This little chunk of tubing is the only thing I do not throw away with the pump and has been used 4 times now.
Last edited by Dionysus; Jul 22, 2025 at 11:28 AM.
I did an oil change last weekend and discovered that after I removed the oil filter my Mityvac was able to pull a significant amount of additional oil out. Call it maybe 1/3 quart. I can't say for sure but I'm guessing that opening the oil filter housing permitted air flow that allowed oil to drain from somewhere that did not drain before. Or it could be that the 20 minute interval just allowed more oil to drain and opening the filter had no effect.
We (Bentley’s Marine) use a 12v oil extractor for I/O’s DD’s VD’s and outboards on lifts. Either way you need to warm up the oil pretty good. Takes a good minute to get the oil out. Ultimately it’s easier to drag the bucket around in the truck than a MightyVac. Kinda expensive kit though.
For my Jag fleet I’m happy with the compressed air Hoyt HF version of a mighty vac.
The orange hose in the HF kit is too large in dia, so I use a small piece of smaller dia tubing that fits tightly inside the orange tube and tightly onto the oil suction tube on the engine. This little chunk of tubing is the only thing I do not throw away with the pump and has been used 4 times now.
Now I am strongly considering the kind of pump you use. Do you know the diameter of the smaller tubing that you use? When you extract oil, about how many liters are you able to get out? Also, do you warm up the oil and if so how long do you keep the car going to get the oil to the right temperature?
Last edited by anborroms; Jul 22, 2025 at 01:34 PM.
Now I am strongly considering the kind of pump you use. Do you know the diameter of the smaller tubing that you use? When you extract oil, about how many liters are you able to get out? Also, do you warm up the oil and if so how long do you keep the car going to get the oil to the right temperature?
The small hose is 3/8" OD / 1/4" ID.
I believe I had a whole coil of it from HD for some other project...irrigation I think. For $7.99, try it before you go to some more serious expense. Report back here if it doesn't do the job as fast as I said.
I do not warm up the oil before I drain it. It doesn't have to be cold, but not good to run the engine shut it off then begin pumping out the oil. Oil will circulate and sit in places in the engine for a long time after shutdown. I'd rather have as much oil in the pan to suck out as possible and not sitting in places in the engine where it will not drain for a while. Just me...other opinions will vary.
I did an oil change last weekend and discovered that after I removed the oil filter my Mityvac was able to pull a significant amount of additional oil out. Call it maybe 1/3 quart. I can't say for sure but I'm guessing that opening the oil filter housing permitted air flow that allowed oil to drain from somewhere that did not drain before. Or it could be that the 20 minute interval just allowed more oil to drain and opening the filter had no effect.
Your thoughts?
The official oil change procedure has you run the engine for 10 minutes, shut it off, loosen the oil filter 4 complete turns, then wait 10 minutes before proceeding. For exactly the reason you say, it allows the filter and housing to drain. https://www.dropbox.com/scl/fi/wrsql...=v4dgbrx0&dl=0
I have found after over a dozen oil changes using the vacuum pump method that the most important thing is to have an air tight seal around the car's extraction tube, so it retains a vacuum. That's why it's called a vacuum pump, duh!
Once or twice the pump struggled to do much if anything and each time I found that the connection of the plastic tubing to the car's metal tube was a little loose, and fixing this did the trick.
So you want/need a tube or plug with the right ID, the same as the car's tube OD, which IIRC is 9 mm.
I went with the Mityvac everyone suggested in the forum and couldn’t be happier…Works great…
One little tip I read was to dip the Mityvac hose in a bit of fresh oil before placing it on the car’s extraction tube. Supposed to both make it easier to go on/off and seal better.
I have found after over a dozen oil changes using the vacuum pump method that the most important thing is to have an air tight seal around the car's extraction tube, so it retains a vacuum. That's why it's called a vacuum pump, duh!
Once or twice the pump struggled to do much if anything and each time I found that the connection of the plastic tubing to the car's metal tube was a little loose, and fixing this did the trick.
So you want/need a tube or plug with the right ID, the same as the car's tube OD, which IIRC is 9 mm.
Yes, I agree with you here. Tight fit is necessary to extract oil quickly/efficiently.
The extraction tube mics out at .310" or about 7.8MM. The plastic tube I use with 1/4" ID (.250) fits on very tightly. In fact I only need it on about 3/8 to 1/2 inch and it is tight enough that it will not come off. A little oil on the tube works and this setup is still tight.
Thank you everyone for your replies, suggestions, thoughts. Much appreciated. At first I was thinking of getting the Mityvac but I prefer to have the oil extracted straight into a container for disposal, and I suppose cleaning the Mityvac would be another chore. I will try the pump version suggested by Dionysus.
Oil Change with Electric Oil Extractor Pump
