The oil pan covers the bottom of the engine.
You mean the oil drain? In the oil pan.
According to the 1997 Mercury Villager Owner Guide : With engine oil filter change the 3.0 liter V6 engine takes : ( 4.0 liters / 4.2 US. quarts of 5W-30 engine oil )
At the bottom of the engine, right side, near the front, by the alternator.
If you mean the oil pressure sender it's right next to the oil filter.
According to the 1997 Mercury Villager Owner Guide ( and one of the Ford websites ) The 3.0 liter V6 engine takes the ( Motorcraft FL-839 ) engine oil filter
The oil pump is behind the front cover driven by the timing belt.
5W-30 is the preferred oil ( according to the 1996 Mercury Villager Owner Guide )
The oil pressure sending unit is located right above the oil filter.
Bottom front of engine.
right above the oil filter on the transmission side of the filter mount
According to the 1998 Mercury Villager Owner Guide ( 5W-30 ) is the preferred oil
The oil pump is located inside the oil pan.