Cylinder bores usually have a cross-hatch pattern for bedding in of rings on a new engine. As the rings bed in they wear off the cross hatch pattern to smooth walled cylinder bores in perfect fit with the rings. Guess where the metal goes from the cross hatching - into your oil, as well as out the exhaust. So 1000km oil & filter change a great idea IMHO.

And any qualified mechanic can do services without voiding your warranty, not just ultratune. Ultratune can do it because of the Trade Practices Act provisions, and so can any qualified mechanic. Ultratune just market this fact better.