What engine oil for Ford Fiesta 2003 petrol engine?

For a 2003 Ford Fiesta with a petrol engine, it is generally recommended to use 5W-30 or 10W-40 engine oil, depending on the climate and driving conditions. Always check the owner's manual for specific oil specifications and any manufacturer recommendations. It's also advisable to use oil that meets the appropriate API (American Petroleum Institute) standards.