change oil every 7,000 and trans service at 25,000 and clean air filter when its dirty which is only every couple years or so. i also rotate my tires every 5,000 miles.
How come every 7k?
Sweet, I do 5k. I figure that is pretty safe!
I try for 3k but its rare when I'm on point, I always lose track. So it happens whenever. I really need to do my diff fluid soon. I can only imagine how nasty it is with all the water and mud I drive through.
How often do you changle your oil, ford air filter, and do basic maintenance on your truck? Are you fussy about it such as doing it at the proper time/mileage or just whenever?