Type of oil for a 2008 ford 6.8L engine?

The 2008 Ford 6.8L V10 engine (typically found in the Ford F-Series Super Duty trucks and E-Series vans) calls for conventional or synthetic 5W-20 motor oil. However, you should always check your owner's manual. The specific recommendation might vary slightly depending on your vehicle's configuration and operating conditions. The owner's manual will provide the most accurate and up-to-date information.