engine oil & quantity 6.1

The Factory Service manual states that the 6.1 Hemi requires 0-40 SYNTHETIC, the specifically mention Mobil 1.

Here's the quote.

NOTE: For 6.1L only Use API rated SL/CF full synthetic engine oil, such as Mobil 1. SAE 0W-40 is recommended. Refer to the engine oil viscosity chart for the correct SAE grade meeting DaimlerChrysler Material Standard MS-10725.

Regards,

Joe Dokes