Originally Posted by roylok
4Driver4 it removes more oil than draining it , the hose reaches to the bottom of the pan, and I guess with draining it you have to account for a little "lip" for the plug threads which might leave a few ounces behind.
This has been my experience, too, on the cars I've used my extraction device on. I'm getting more oil out and having to re-fill with slightly more than I'm accustomed to. The extractor also permits you to pull the oil from the filter housing.
The only way to get the last bit of oil from the drain pan (when using the drain plug) would be to tip the car on its side
This is my Harbor Fright unit. I set it up and walk away. You can see (and hear) on the gage when you've sucked the pan dry. It's compressor-driven: