The MIA (and sorely missed)
Bill D. used on on his Audi and thought it worked well. On some cars oil changes are a lot more work than on others, and R&Ring the filter (as the only under-car part of the job) can be a lot easier than draining the oil into a pan and then transferring it to some other container (if your pan doesn't transport well. Some vehicles have the oil filter up top where you can simply reach down and unscrew it too- bet it'd work great on my RX-7.
Yeah, I have one, but no, I've never used it for oil changes yet (good for siphoning other liquids though). FWIW the ad-copy from Griot's claims they were tested and get more oil out of some vehicles than draining it the normal way
