Before you buy any oil, check your owner's manual. It's the definitive source for your car's needs. The viscosity (like 10W-30, 5W-20, etc.) is crucial and using the wrong one can damage your engine. The manual may also specify whether to use conventional, synthetic blend, or fully synthetic oil. While synthetics are often better, using the correct conventional oil as specified is always preferable to using the wrong type of oil.
If you don't have the owner's manual, you can often find a digital copy online through Ford's website or a reputable automotive parts website.
