The Thousand Dollar Oil Change

Every time I have the oil changed on my car, it seems like they magically find at least $1,000 of work that needs to be done right away. Does that only happen to me? Maybe it has to do with the condition of the cars I drive. I better start doing my own oil changes again, especially if it will save me $1,000! AutoZone should put that in an ad, change you own oil, save a grand.