However, generally speaking, for a 1992 Ford Explorer, you'd likely be looking at SAE 10W-30 as a good all-around choice for most climates. SAE 5W-30 might be a better option in colder climates, offering easier starting in low temperatures.
Crucially: Check your owner's manual. The recommended oil grade will be specified there based on your specific engine (e.g., 4.0L V6, etc.). Using the incorrect oil grade can damage your engine. The manual will also specify the correct oil type (conventional, synthetic blend, or full synthetic).
