I went to WalMart ONCE to get my oil changed, only to find out that they never actually CHANGED THE OIL (or at least not the filter)!!! When I went back to the dealer (because I would get coupons periodically for free oil changes), they asked me when I had gotten the oil changed last and I told them when it was and they said "Hmmm, that's interesting because you have a *brand* oil filter and they can't get these at WalMart and your oil is FILTHY". I had them put it in writing and wrote a letter to WalMart corporate and they sent me back an apology letter with a coupon for a free oil change ::huh: