Generally, for a 2001 E-150 V8, you'd be looking at either:
* 5W-30: This is a common and often recommended weight for a wide range of temperatures. It's a good all-around choice.
* 10W-30: This is suitable for warmer climates.
Do not solely rely on online information. Always check your owner's manual for the specific recommendations from Ford for your vehicle. The manual will detail the correct oil weight based on your climate and engine type. Using the incorrect weight oil can negatively affect engine performance and longevity.
