I used to do that at my friends shop--he was always impatient and would dump a quart in a customers car,and not wait for every last drop to go in,he'd just dump in most of it,cap it and toss it in the rubbish..and I'd go grab the bottles at the end of the week and take them home and I rigged up a piece of vinyl gutter so I could let all the bottles drain overnight into a empty oil jug...I used to get at least 5 quarts for every 20 or so "empty" bottles..free oil changes!..
He did not mind me taking the empties--saved him from having to dispose of them,and I just put them in the wood stove after they were drained..threw some nice heat!..
I toss my old oil filters in the stove too,after a good hot fire is going..they burn a good 20 minutes,and the only thing left is a spring rattling around inside the "can"..then I can take them to the dump's metal pile,they wont accept ones with oil residue in them,those have to be put in a hazardous waste dumpster and you get charged for them..
Several years ago a guy I knew who ran a big rig diesel repair shop had a load of used cartridge style oil filters he had to get rid of..
I almost filled the bed of my truck up with them..
I used those instead of logs,it took me a week or so to burn them all--they did not make any smoke at all as long as you had a good bed of coals in the stove--the perforated metal wrapping around the cartridges would glow bright orange for almost half an hour or more,they looked like a catalitic heater !..you had to be careful not to get the stove red hot..I put a squirrel cage fan next to the stove to prevent that and circulate the heat better..
