 Since 11/07, truck has been in shop 7-8 times. Last time it had the entire head replaced; took about 30 days. Absolutely NO POWER to this date. Also have an 08 GMC 2500 Duramax, blows this Ford out of water with power. I am sad to find all these posts as I am doing research tonight on my new truck- 2009 Sierra 3500. Will be at GMC tomorrow getting trade-in appraisal for it. I do excavating so I am daily towing 10-12k trailer w/ either a mini-ex or skid-steer. Absolutely a dog in power. Took to Ford dealer several times, they say it's fine. Get literally 7-8 mpg avg. GMC gets 11-12 towing same exact load w/ tons more power.  If you love yourself, PLEASE do not buy this truck. 