I actually have a tough time believing this because I too had a friend that took his Honda CRX into Wal-Mart for an oil change. They forgot to put his drain plug back in and his engine seized on the way home. Wal-Mart told him to try and prove it was them and that even if it was they assumed zero liability from it. He got shafted pretty hard. Lost his car, wasn't reimbursed, and is now a major advocate of banning Wal-Marts from towns all across the U.S.