Shameless rip:

When service is required, DaimlerChrysler Corporation recommends that only Mopar brand parts, lubricants and chemicals be used. Mopar provides the best engineered products for servicing DaimlerChrysler Corporation vehicles.

Only lubricants bearing designations defined by the following organization should be used.

Society of Automotive Engineers (SAE)
American Petroleum Institute (API)
National Lubricating Grease Institute (NLGI)
API SERVICE GRADE CERTIFIED
Use synthetic engine oils, approved to MB 229.3 or MB 229.5, such as Mopar part number 05127394AA. Synthetic SAE 0W-40 or SAE 5W-40 engine oils approved to API SL and/or GF-3 may be substituted. The FFS may not alert for an oil change at the proper interval if an unapproved product is used; engine damage and reduced engine life may result.

SAE VISCOSITY




Use synthetic engine oils, approved to MB 229.3 or MB 229.5, such as Mopar part number 05127394AA. Synthetic SAE 0W-40 or SAE 5W-40 engine oils approved to API SL and/or GF-3 may be substituted. The FSS mat not alert for an oil change at the proper interval if an unapproved product is used; engine damage and reduced engine life may result.