View Full Version : Vacuum Oil Change system

03-22-2015, 11:57 PM
Since the filter is on the top of the 3S engine and it is harder to get the jack under the car, I decided to try one for vacuum oil extractors. For those not familiar, you put a tube down the dipstick tube, pump the vacuum vessel to build vacuum, open the valve and the oil magically come up through the tube into the tank.

I got this one from Amazon


To start off, it does work. But, this first run it took a lot longer than it probably should have to get the oil out. I read the reviews before I bought it and some of the reviewer complained that you had to do extra sealing on the caps so it would maintain the vacuum. They were reporting that it would drain a car oil pan in about 3 minutes or so. My case was more like 30 or so. I had to keep closing the valve and pumping the vacuum. For a car, they recommend 40-50 pumps, so my experience the first time was quite tiring.

One thing I didn't like about this particular system is that the back support that holds the vacuum pump is plastic and slides up on a mounting shoe. It is not fixed to the tank other than through friction. I had this thing slide off a few times and the back of the vacuum pump goes with it. I ended up having to hold it in place.

Right now, I'm reserving judgment until I have chance to use it again. I'm going to make some modifications to it, Teflon tape all of the threads and such to make sure that the tank holds vacuum. Hopefully that will speed the process up.

03-23-2015, 04:51 AM
Thanks for the review Mike. :)

You should do these for other auto related items you happen to pick up.

03-23-2015, 05:44 AM
Even with one of these I'd still suggest doing a "regular" oil change every so often to get all the crud out of the bottom of then pan. I'm thinking of going to wheels ramps for doing oil changes to save time though.

03-23-2015, 09:53 PM
They have a decent set of ramps at Harbor Freight for under $50 that work well and get the car about 10" up.
(From the tires mind you, so you actually have a good bit of room to roll under there with a creeper.)

03-23-2015, 10:45 PM
Who needs ramps when you have 10" rear axle clearance on a RWD? Roll under on a creeper, crack it open, roll on out.

I used to have a pair of plastic harbor freight ramps that worked great. Lowered cars though I had to use a blue 2x4 to help get it up.

03-23-2015, 11:16 PM
The ones I was talking about are the metal ones. They are really sturdy and have a gentle slope, so anything not slammed should go up fairly easily.

03-24-2015, 02:26 AM
I need to get another set of ramps. I had some years ago when I had my El Camino. I'll check those out at Harbor Freight.

I was curious as to how this vacuum oil extractor would work. I have read a lot of review of them over the years and most were positive. The one I got works pretty good but like I said earlier, I'm going to reseal it to see if it does better.