The 2012 Ford Fusion 2.5 L takes about 4.5 quarts of engine oil when performing an oil change with the filter installed, using Ford’s recommended viscosity of 5W-20.
Oil capacity and viscosity
The Duratec 2.5 L I-4 engine holds roughly 4.5 quarts (approximately 4.3 L) of oil when a new filter is installed. The standard recommended oil viscosity for this engine is 5W-20 under normal driving conditions. If you skip replacing the filter, you’ll use slightly less oil, but you should still verify the oil level with the dipstick after refilling.
Maintenance tips for an oil change
When performing an oil change, plan to drain the old oil, replace the oil filter, and add 4.5 quarts of new oil. Start and run the engine, then turn it off and wait a moment before checking the level with the dipstick and topping up to the full line if needed. Dispose of used oil responsibly.
Summary
Bottom line: For a 2012 Ford Fusion 2.5 L, expect to use about 4.5 quarts of engine oil with a new filter, using 5W-20. Always confirm the final oil level with the dipstick and consult the owner's manual for any model-specific notes.