To find the correct oil type, you should:
* Check your owner's manual: This is the most reliable source. It will specify the recommended oil viscosity (like 5W-20 or 5W-30) and type (conventional, synthetic blend, or full synthetic).
* Look at the oil fill cap: Sometimes the recommended oil type is printed on the oil fill cap.
* Use the Ford website: You can enter your vehicle's year, make, and model on the Ford website to find the recommended oil specifications.
Providing the year and engine of your Ford Explorer will allow for a more precise answer.