Okay, that poses a good question. I was reading the owner's manual one day while waiting some where. I was bored okay! It said I should change the oile every 7k? I thought really? I usually change my cars 3-5K depending on what kind of driving I do. I usually drive my Focus a lot of highway miles to and from work (27 miles 1 way). I drive my truck around town. A lot of stopping and going with my paper route. My wife drives the Dodge van, which I hope to rid of some day and replace with a Ford Explorer or something with a 3rd seat and 4 wheel drive.
1992 Ford Ranger STX 4x4
4.0 Liter (6 cylinder)
"When I grow up I want to be an F150"