While plastic containers are perfect for recycling, containers that formerly held oil or other flammable liquids are not welcome at recycling centers. That's because those substances pose special problems during the recycling process, including creating flash points and changing the chemical composition of plastics. Containers that once held motor oil, lighter fluid or pesticides should not be recycled, even if they have a recycling symbol. Instead, they should go in the trash or be reused at your home for a purpose that won't be affected by the residue.
ANDREWS MCMEEL SYNDICATION