I owned the Ford F-250 w/ the Power Stroke. At 23,000 it blew an oil seal, got towed in and charged for an additional oil change ($80.00 dealer charge). At 38000 mi. blew a seal on the high presure fuel pump. Ruined the pump, repaired under warranty. This only cost me $350.00. ($200.00 for the tow in, $100.00 deductable for the warranty and $50.00 to clean the deisel fuel off my truck. I was stranded in Branson MO for two days waiting on it to get repaired. I drove home and straight to the GM dealer to traded it in for an 04 Chevrolet 2500hd w/ the duramax/ allison. I love it. 48000 miles later, no worries.
I am still shopping for my first AS, but I feel good about the tow vehicle.