I change the oil filter regularly on my 4wd (and my cars) but as I'm not a workshop I don't have any sort of organised scheme for disposal and possible recycling. I usually drain oil from old filter, put old filter on box the new one came in, and put it in the regular rubbish bin.
Is that was everyone else does who isn't a commercial repairer or service outlet?
Is that was everyone else does who isn't a commercial repairer or service outlet?