About 5.7 quarts of engine oil (with the filter) for a full change on the 2018 Ford Fusion with a 2.0 L EcoBoost engine.
Oil capacity and oil type for the 2.0 L EcoBoost
The 2.0 L EcoBoost in the 2018 Fusion uses synthetic 5W-20 oil. Ford lists the engine oil capacity for a complete oil change, including the filter, as 5.7 quarts (5.4 liters). This is the standard specification for this engine. Variations can occur if you use a different filter or components, so always verify the level after the initial fill and adjust as needed.
Practical guidance for owners
When performing an oil change, use a compatible 5W-20 synthetic oil and a new oil filter. After draining the old oil and installing the filter, pour in the full 5.7 quarts, start the engine, run briefly, then turn off and check for leaks. Recheck the oil level with the dipstick and top off until it reaches the correct mark.
Summary: The 2018 Fusion 2.0 L EcoBoost requires about 5.7 quarts of oil during a standard change with filter, using 5W-20 synthetic oil. Verify the final level with the dipstick after filling.