You can dispose them at any oil and gas stations
Take it to a reycling center near you. You can find one at http://www.recycleoil.org/more.html
Take it to a recycling center. Most Auto Parts Stores will take used oil for recycling. Walmart will also take it.
Take it to a quick oil change place and they can recycle it with their used oil.
Check your local Wal Mart auto department. Many of them will dispose it for you.
fire
yes used car oil can burn
Take it to anyplace that accepts used engine oil for recycling. Walmart, and most auto parts stores.
Most autoparts stores will take used oil for recyling. Local landfills generally take waste oil too.
You can take an old car to a salvage yard to dispose of it and earn some extra cash.
It must go to a petroleum product recycling depot. some local parts stores or shops may be able to help you dispose of your filters
there is no universal best oil for a used car. The oil required for your car is specified in the owner's manual, or you can do a google query on the make and model.