Engine Oil

From OE Owner's Manual for SRT-8 6.4L engine:

For best performance and maximum protection under all types of operating conditions, the manufacturer only recommends full synthetic engine oils that meet the requirements of Chrysler Material Standard MS-10725 and are approved to MB 229.3 or MB 229.5. The manufacturer recommends the use of a full synthetic 5W-40 or equivalent engine oil.

From OE Service Manual for SRT-8 6.4L engine:

MOPAR API Certified SAE Full Synthetic engine oil 0W-40, meeting the requirements of Chrysler Group LLC Material Standard MS-10725.