Well, I really think, a long time ago, you really PROBABLY needed to change your oil every 3k miles or so... I'm sure that's how it started, as engines didn't last as long as they do know. That being said, you don't have much of a choice going in to JIffy Lube, unless you bring your own oil.

Now, those of us who know how to change oil and don't trust the Jiffy Lubes of the world can decide... and some of us do feel better knowing the oil is newer, sooner. That being said, my opinion stays at changing more often than not, no matter what I use. Now, THAT being said, I think I will go back to Mobil 1.