How should I dispose of used lubricating grease?
Used lubricating grease should be disposed of in accordance with all federal, state and local environmental regulations. In some cases, used oil recyclers will accept used grease. Some municipalities or industries hold household chemical disposal drives at which grease may be accepted. Depending on the service the grease has been in and contaminants to which it may have been exposed, used grease may be contaminated and considered to be a hazardous waste and may require special handling for disposal. Used grease should not be re-used.