Originally Posted by dresselbrew
Just remember a food grade barrel will probably have a liner and the liner isn't food grade when it burns. I'd take an unlined motor oil drum over a lined "food grade" drum any day.
The drums that I get are unlined food grade that contained olive or canola oil...fyi. Most of the food grade drums that are lined may have contained a citrus / acid based food product...so it's best to look before you leap.