While I use the Rotella Sync in the tractor and motorcycles I'm also a big fan of Royal Purple. Truly liquid gold when you look at the price. Some pretty amazing stuff however. I provided via a dyno that running it gave me a hp gain in my Miata that I raced. No jokes please. If you look on their FAQs page you will see the below statement. The purple juice is super slick.
Can I put Royal Purple into my brand new car?
Yes. Royal Purple currently offers many viscosity grades of API Licensed Motor Oils. To allow for proper break in of the engine, Royal Purple recommends waiting until the manufacturer’s first scheduled oil change or a minimum of 2,000 miles in new gasoline engines. Allow 8,000 to 10,000 miles before using Royal Purple in diesel engines.
You can also call them directly and talk to an engineer about diesels and break in.