Hello everyone. I just have a question regarding this particular engine. It comes in two different configurations that I am aware of. One is a regular gasoline engine and the other is a flex-fuel engine. I am wondering if the Flex-fuel engine is just another example of "just more to go wrong." Do any of you have any knowledge of or experience with this engine? I am thinking of an F-150 and was just wanting some feedback. Thanks in advance for any of your replies.