1. Mobil 1: Mobil 1 Extended Performance High Mileage Full Synthetic Motor Oil (0W-40 or 5W-30)
2. Castrol: Castrol Edge High Mileage Full Synthetic Motor Oil (0W-40 or 5W-30)
3. Valvoline: Valvoline SynPower High Mileage Full Synthetic Motor Oil (0W-40 or 5W-30)
4. Pennzoil: Pennzoil Platinum High Mileage Full Synthetic Motor Oil (0W-40 or 5W-30)
5. Amsoil: Amsoil Signature Series Synthetic Motor Oil (5W-40 or 10W-40)
Note: It's important to always refer to your vehicle owner's manual or consult with a trusted mechanic for the specific oil grade and type that is recommended for your 2008 Ram 1500 5.7 Hemi.