Supposedly the V6 in our Mountaineer is a Flex engine. so what's the point if I can't fill up with ethanol or can I? what is recommended? can it run purely on ethanol? where do you get ethanol? any info on this engine would be great.

If the 8th character in the VIN# is a K then it is flex fuel able to run on E85[85% ethanol/ 15% gasoline]. see the sight for availability.http://www.e85fuel.com/information/vin.php[img]smileys/smiley2.gif[/img]