I just went in for 15k maintenance... Turned out a bit more costly (and long!) than anticipated. Lost about 4 hours of my life and $300, because my front tires were out of alignment (well hopefully that's most of it! my previous visits were much less expensive).

But I asked the guy at the desk about the flavor of oil they'd use and he informed me it shouldn't matter if I got it changed every 3k miles. "I know it says 5k in the book but..." Somehow I still tend to believe the manufacturer who doesn't have a vested interest in me coming back twice as often, over the dealer. Especially when I read a while back something about how Toyota had actually come back _down_ from 7500 miles, because people were pushing it past 7500. So they knocked it down to 5k to be safe. Somehow I don't trust the altruism of the guy who works for the place looking to double my oil change expenditures in their shop.