I recently had my engine replaced 6 months ago and had my oil changed at a different company that usually has a long wait. So since I had some shopping to do I took my van to have an oil change at Wal-Mart. Two days after my oil change my engine started knocking and a plume of smoke came out of the tail pipe. I took my van to my mechanic and he verified my engine blew due to the oil change and that I would need a new engine. I went to Wal-Mart who sent a lady with camera to take pics of my van and who took a small sample of the oil. A few days later Wal-Mart denied my claim based on the pics and a small sample of oil! I wish I knew about Wal-Mart's track record before I let them touch my van. Now I got to buy a new vehicle. Wal-Mart has lost a shopper forever.