The 03 in my sig is my daily driver . On average I get around 12 mpg ,not the best but hey its not an escort. I have no issues towing cattle trailer and cattle (total weight around 8000) on a semi-regular basis. I have to agree with Redford that if you are towing over 10000 the 5.4 is not a wise choice , Below that it is plenty capable of hauling the load. Only negative issue I have is 3 exhaust studs have rotted off ,but I still don't have a leak and until I do it won't get touched.