I just bought a 2002 Ford Ranger 4X4 Edge with 43000 miles. My driving habits are this - I drive mainly in town and back and forth to work (3 miles). Every two weeks I usually make two 54 miles round trips. This truck has the 4.0 SOHC engine. What oil and oci should I use? I had a Chevy Blazer which I used Mobil 1. I changed the oil every six months at which time I have usually put 4500 to 5000 miles on vehicle.