To find the correct oil weight and capacity:
1. Locate your engine's identification: This is usually found on a sticker on the engine itself, or in the engine compartment. It will indicate the engine size (e.g., 4.2L, 4.6L, 5.4L, 7.5L).
2. Consult your owner's manual: This manual will list the correct oil type (e.g., 5W-30, 10W-30) and the capacity in quarts or liters. This is the most reliable source.
3. Check online resources: If you don't have the owner's manual, you can search online for "1999 Ford E-150 [engine size] oil capacity." However, always double-check this information against your owner's manual if you find it.
Without knowing the engine size, it's impossible to give you a definitive answer. Adding too much or too little oil can damage your engine.
