I've got a '98 Ranger with the 3.0/5 speed manual. I'm probably not going to tell you what you want to hear, but just run a conventional oil with the filter of your choice for 5K miles, unless it's been previously neglected.
Those oil filters are a real pleasure to change on this make and model, aren't they?
Those oil filters are a real pleasure to change on this make and model, aren't they?