under the car there is a plastic panel that has to be removed. once that is removed you will see the oil filter cap. mine has the soft filter and o-ring washer that gets replaced when you change the oil. i believe it is a Allen wrench bolt head that holds the filter inside the cap. hope this helps.
It requires 6.0 quarts of SAE 5W20 oil with filter change.
According to the 2008 Ford Fusion Owner Guide ( for North America ) With engine oil filter change : The 2.3 liter four cylinder engine takes ( 4.5 U.S. quarts )
Motorcraft Oil Filter: FL-820S
According to the 2008 Ford Fusion Owner Guide ( 5W-20 )
4.5 quarts , with engine oil filter change ( according to the Owner Guide )
According to the 2008 Ford Fusion Owner Guide ( 5W-20 ) * for the 3.0 liter , DOHC , " Duratec " V6 engine ( with engine oil filter change , 6.0 U.S. quarts / 5.7 litres of 5W-20 )
According to the 2008 Ford Fusion Owner Guide ( 5W-20 )
The Ford Fusion V6 takes 6.0 quarts of 5/20 engine oil, including the filter.
According to the 2012 Ford Fusion Owner Guide : For the 2.5 liter four cylinder engine : ( Motorcraft FL-910S engine oil filter )
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Fram Oil filter PH3600 Air Filter CA10242
According to the 2007 Ford Fusion Owner Guide : With engine oil filter change , the 3.0 liter V6 engine takes ( 6.0 quarts / 5.7 liters )