Is auto-rx just as effective on short trips as it is one long highway drives? Some of you already know this but I'm 400 miles into the clean phase of my arx treatment but I do make a lot of short trips less than 10 miles, where I work is only 4 miles away from my house. I do usually try to take on a drive of 15 or 20 miles at least once a week but sometimes that just doesn't happen. Will I get as good of a cleaning on short city trips as I would on long highway roadtrips? Has anyone done arx with a lot of short trips? I have an 88 Bronco II with 46k.