I live in a
city and have always had access to recycling so I have no suggestions as to what to do with it.
My neighbor uses it every few years to coat his
wood shingle roof with! (I think it's motor oil) It stinks up the whole neighborhood for a few days after he does it, and his roof is almost black. I think it's the same idea as said above about coating the
fence posts. Considering how hot and dry it is here I think it's a horrible idea. Seems like an invitation to fire (and maybe cancer).
What I would like to say is that in my personal opinion, many people change their motor oil way too often. I change mine every 10,000 - 12,000 miles....sometimes maybe 15,000. Some people do it every 3,000 - 5,000 which I think is wasteful, and not necessary. I've done this since I was a teenager. I've never owned a new car, never had engine problems, and have always had cars with 150,000 to 300,000 miles on them. My current rides, a 1977 jeep cj (with over 200,000 miles) and 1998 4 runner (199,000 miles) are running great. I use the cheapest oil I can find (usually walmart), and again, I don't change it until at least 10,000 miles.
If I had a new engine, I would probably change the oil every 3-5K miles for the first 20k miles. After that, I'd let it go to 10K+.
I genuinely believe it's marketing to get people to buy more oil. My dad did this as well, and he never had any engine problems with any car he owned. I know, I know, lots of people will believe it needs to be changed more often, and the highest quality needs to be put in more frequently. People are going to believe what they're told. I'm just saying what's worked for me for my entire life driving. I've never been to a mechanic in my entire life, done every car repair I've ever needed done. If I thought I'd have to be working on my car's engine because of neglecting the oil, I'd change it more often....
I also heard a story, not sure how legit it was, that a diesel truck driver would collect his neighbors motor oil and use it in his big rig for another 20k miles? I have no idea if that is true though.
Oh yeah, I'm also a cyclist/mountain biker. I save a bit of my used motor oil and oil my bike's chain with it on every other ride. Works great, and prevents me from having to buy oil for my chain. I imagine it could be used on a garage door chain, motorcycle chain, etc. It's messy, but it works.