like the others have stated, if the 3.0si seat hurts your back, you probably need to adjust the seat position. I like my seat back to be somewhat reclined, but then I have to move the seat forward to comfortably reach the steering wheel and pedals. Muscle strain is a likely result from overreaching for the SW and pedals duirng an extended trip due to an improperly adjusted seat. I've gone on a 9 hour drive and many 5 hour drives, with no back pain, once I realized the importance of proper seat positioning.