The recommended grade of engine oil for a 2007 Ford Fiesta 1.6 Ghia will depend on the specific climate you live in and the type of driving you do. However, you should
always consult your owner's manual. It will have the definitive answer, specifying the correct viscosity grades (like 5W-30, 10W-40, etc.) and the required oil specifications (like Ford WSS-M2C913-A or similar).
Looking up the specifications online for a 2007 1.6L Ford Fiesta engine is also helpful but the owner's manual is the ultimate authority. Using the wrong oil can damage your engine.
