From the Mobil 1 Website under the Myths section:
You should break in your engine with conventional oil, then switch to Mobil 1.
You can start using Mobil 1 with SuperSyn™ in new vehicles at any time, even in brand-new vehicles. In fact, Mobil 1 with SuperSyn™ is original equipment (it is installed at the factory) in:
* Chevrolet Corvette
* All Porsche vehicles
* Mercedes-Benz AMG vehicles
* Dodge Viper
* Ford Mustang Cobra R
* All Aston Martin cars
One of the myths that persists about Mobil 1 is that new engines require a break-in period with conventional oil. Current engine manufacturing technology does not require this break-in period. As indicated by the decisions of the engineers who design these high-performance cars, Mobil 1 with SuperSyn™ can be used in an engine from the day you drive the car off the showroom floor.