Altho this break in oil may very well be true to some people, I have never, ever, heard of doing an oil change at 1k. I have bought alot of cars in my short period of time, some premium some just regular. If your 1k oil change was comped, that leads me to believe it was a good sales pitch for you to buy the vehicle or that it was just a sales pitch for dealer service to keep you coming back for service there. The legitamcy of a 1k oil change? dunno bout that
IF 1k oil change was really needed, there would have been documenation from Mazda regarding the need for it and/or it would be routine maintenence as part of the schedule I would think.