At least one thing I learned through the years is that if you value your personal auto in the least bit, never (and I do mean never) allow Wal-Mart to change the oil...guaranteed screw-up 100% of the time. I've never had one good experience with them doing something simple, such as putting in the requested oil weight, or tightening the oil pan drain (yes, that happened). You know what they say, "If you want it done right, do it yourself" seems to be the motto of the day. OK, let me apologize for slamming Wal-Mart...I'm sure they do occasionally get the job done right...just pointing out that they are batting .000 with me. Seriously, they are fine...yep.