Generally, for a 2010 Mustang V8, you'll want to use:
* Oil Type: 5W20 or 5W30 (Again, check your owner's manual. Some might specify only one of these.)
* Oil Certification: Look for an oil that meets the specifications listed in your owner's manual. Common certifications include Ford WSS-M2C945-A or WSS-M2C930-A.
Don't rely solely on online advice. The owner's manual is the definitive source for your specific vehicle's needs.