5 W - 30 in the 4.0 liter V6 engine
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!
5W-30 is the preferred oil ( that's what I've used in my 1995 Ford Explorer since 1995 )
Bottom of the engine on the oil pan.
5W30 is the preferred oil , but if you live in an area that never gets below the freezing point you can use 10W30
Underneath the engine on the oil pan. Large nut.
summer: 10W30 winter: 5W30
If you have the owner's manual, it usually says what kind of oil you need in there.
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
( 5W-30 ) according to the 1997 Ford Explorer Owner Guide
On the passenger side of the engine , straight up and down