Has anyone tried the Max Energy E-CON?
 

I see that Hypertech has come out with a economy prgrammer it is the max energy E-con prgrammer it claims 2 to 6 mpg gains! Has anyone used this yet and is it worth the $$$!

I sold one a while ago, the customer hasn't complained yet. On a diesel I would think this was easy, but I don't think hypertech has made some unique discovery to make a naturally aspirated gasoline engine that much more efficient.