However, generally speaking, a 1994 Ford Explorer likely called for a conventional oil, and the viscosity (like 10W-30 or 5W-30) would be specified in the owner's manual. Modern synthetic blends are often used as an upgrade, providing better protection, but always check to ensure it meets the manufacturer's specifications. Never use an oil with a viscosity outside the recommended range.
In short: Do not rely on internet advice. Find your owner's manual for the correct specifications. The manual will tell you the correct weight (e.g., 10W-30, 5W-30) and type (conventional, synthetic blend, or synthetic) of oil for your specific engine.
