I want to share a little something about the 4.0 V6, in 2007 just a few weeks before I bought my car that Memorial Day, I was at the NY International Auto Show and visited the Ford booth. A once in a life time chance a met and spoke with Mark Fields who was there that day, originally I just complained how I didn't like the Flex, but we began to move on to the Mustang and I spoke about me being in the market but wondering whats the deal with the V6 what he said basically make you wonder WTF, he went on to tell me the basic fuel economy pitch, but then said with stock parts it was designed to be equiped with Twin Turbos for an output of 500Hp,I had to make sure I heard right and asked "You mean no other mods but installing the twin turbos?" he said Yes, that there was a test mule 500hp twin turbo 4.0 V6 being used for performance and durability/reliability testing. And yes sounds like something he made for a pitch, but we did talk for quite a bit and there were things he spoke of such as the 5.0 development and even plans to have SYNC in the Mustang in 2010 refresh. Will say a very nice and pleasant person to talk to.