When I was working in El Paso I would take my truck (Sonoma with 95k on it) in for a combination car wash and oil change on a coupon. On a trip to San Antonio, after about 300 miles of 80 mph driving, the transmission fluid boiled over. Turned out they were changing the oil but not checking other fluids or items like a normal oil change business so the fluid had gotten extremely low. I put in a couple of quarts of t-fluid in Junction and had the transmission rebuilt when I got home. So now I'm not too lazy to check all the fluids before I head out on a trip.