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Discussion Starter #1
I was wondering which engine oil extractor (manual or otherwise) that you guys are using? Any hose mods you have to do to the 8 liter + products you find on Amazon or Harbor Freight?
 

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I have used one from Griots for a long time. Only 5 quart but has a shutoff so when full it shuts down. Then I dump in my black pan and get the rest out. I have been thinking of getting one of these so I do not need the tube.
This seals near the top and I believe is what the dealerships use.
s-l500.jpg
 

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I have a metal Topsider that has been ok for many years but replaced it with a plastic one because it is easy to see the level but needs new seals which I have been unable to locate. If I were to buy another, which I am not planning to do, I would consider a Mityvac or a Topsider.
As far as the John Dow adapter, I have the Metris and an e320 and they have different size dipstick tubes
 

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I have a metal Topsider that has been ok for many years but replaced it with a plastic one because it is easy to see the level but needs new seals which I have been unable to locate. If I were to buy another, which I am not planning to do, I would consider a Mityvac or a Topsider.
As far as the John Dow adapter, I have the Metris and an e320 and they have different size dipstick tubes
Does it with the Metris?
 

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Discussion Starter #6
I have a metal Topsider that has been ok for many years but replaced it with a plastic one because it is easy to see the level but needs new seals which I have been unable to locate. If I were to buy another, which I am not planning to do, I would consider a Mityvac or a Topsider.
As far as the John Dow adapter, I have the Metris and an e320 and they have different size dipstick tubes
Yea I read an older thread where you said the topsider wasn't holding vacuum anymore. I'm looking at the Mityvac...but I like the idea of the pneumatic + manual combo models such as the OEMTOOLS https://www.amazon.com/OEMTOOLS-24397-Liter-Fluid-Evacuator/dp/B07N7X4TP9/
 

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Discussion Starter #7
I have used one from Griots for a long time. Only 5 quart but has a shutoff so when full it shuts down. Then I dump in my black pan and get the rest out. I have been thinking of getting one of these so I do not need the tube.
This seals near the top and I believe is what the dealerships use.
View attachment 17388
how the heck does this thing work?
 

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Discussion Starter #10

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I take it that the dipstick tube goes right to the bottom of the sump to get all the oil out? I had imagined putting a tube in right to the bottom.
 

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Virtually every dealer sucks out the oil nowadays. That includes any dealer working on these vans. Works just fine and its waaay easier. I've been changing the oil on 7 different cars that way for 10+ years. No problems, it gets it all out.
 

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Discussion Starter #14
I have a Mityvac 7201. Works well.
I'm wondering if you , or any other who used an oil extractor, also pulled the drain plug afterward to see how much oil was left in the pan. From videos on youtube, it seems some vehicles still leave a cup or two of oil after extraction.
 

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Discussion Starter #15
I don't understand why you guys choose to suck the oil out VS using the drain plug the way the engine was designed to empty the oil completely? JMHO
I've seen youtube videos where the oil extraction does a more complete job than from the drain plug... due to oil pan design and vehicle up on ramps/ etc. I'm planning to keep this Metris until it falls apart, so the less I have to unscrew the bottom cover and drain plug, the better. Plus as mechanically clined as I am, I'm still not a fan of getting up under a vehicle plus the mess that the drain plug release can make.
 

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Discussion Starter #16
Virtually every dealer sucks out the oil nowadays. That includes any dealer working on these vans. Works just fine and its waaay easier. I've been changing the oil on 7 different cars that way for 10+ years. No problems, it gets it all out.
Agreed. I got walked back to my Metris by a tech to get some items out and saw the same 'extraction' going on two different vehicles. That with the easy access to the oil filter on top makes it a no-brainer to go this route. I'm out of bumper-to-bumper ( 7/120k ELW ) and the saving on on doing Service A myself can go to the B, tranny fluid change, and spark plugs coming up.
 

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I first used an extractor nearly 20 years ago on my ml. I also wondered if all of the oil was removed so, after extracting it, removed the drain plug and found that nothing came out. I am sure it varies from brand to brand but think that those that are designed for extraction would not leave residual oil.
Regarding my first extractor, a Topsider, after dropping it several times over the nearly 20 years of use, I dented one of the covers and it was difficult to seal. The plastic one I replaced it with has a problem with the cup seal in the vacuum pump getting very soft and the mfg has been unable to supply a replacement seal
 

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Even if it left behind a cup or two of oil that would be insignificant once blended in with several liters of new oil.
The standard transmission fluid change on the 722.9 leaves all the fluid in the torque converter, which is over 3 liters.
 

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I would not use the adapter, the dip stick tube does not go to the bottom of the pan. Yes, I know it's not the end of the world, but I like to get as much as I can out. I use the topsider, been using for 20 years.

However, today I just changed oil on my mother's BMW x5, no dip stick so I had to drop the plug. Much easier to get to than the metris.
 

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When I use my extraction tool I usually move the tube around once it is sucking air to grab any other oil around the pan, sometimes it gets a little bit more. Another good thing is once it sucks air, just let it sit for 10-15 mins, quite a bit more oil will work its way down to the bottom of the pan and you can usually suck out another few cups worth pretty easily.
 
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