summer: 10W30 winter: 5W30
5W-30 is the preferred oil ( that's what I've used in my 1995 Ford Explorer since 1995 )
On a 1994 Ford Explorer : You will find the engine oil filter on the passenger side of the 4.0 L V6 engine
on the bottom of the oil pan!
Bottom of the engine on the oil pan.
Underneath the engine on the oil pan. Large nut.
For the engine oil , it is on the passenger side valve cover
I'm assuming it would be the same as the 1994 Ford EXPLORER transfer case ( MERCON automatic transmission fluid ) I know that's what my 1995 Ford Explorer uses
On the passenger side of the engine , straight up and down
With engine oil filter change ( 5 quarts or slightly less )
5 W - 30 in the 4.0 liter V6 engine
5w-30
( No ) on a 2002 Ford Explorer the oil pump is mechanically driven