Car and Driver once tested a bunch of "fuel mileage enhancers" from magnets on fuel lines to huge mufflers and cold air intakes. Their results showed either zero improvement or very minimal improvements for every one of those devices except one. There was one device that improved gas mileage and it could be retrofitted to almost any vehicle by anyone... That little device plugged in to the OBD II port by the drivers knee and had a cord to a display where it simply showed instantaneous fuel mileage. It can improve fuel mileage into the double digits. Since I started paying attention to the one in my big truck, I've improved my mileage by 9.2%. I keep a log of every fill up and calculate mileage from there. Actually, "fuel log" on my phone does the calculating. My point being I don't rely on gut feel or the Ford calculations from what most people refer to as the "lie-o-meter". The simple display Car and Driver referred to can be had for around $100 and literally takes a few seconds to plug in.
Since our driving habits can affect mileage so much, I wonder if Elio would consider making instantaneous mileage part of the standard dash. I surely don't want to have to buy an aftermarket thing that plugs into the OBD II port but I will. And no, the Skyz thing, if it is a huge "look, I have a stupid tablet glued to my dash" looking tacky thing, will not suffice. While the potential is cool, the execution looks rediculous (so far).
In short - even my modest 9.2% gain in mileage would take Elio from 81 to 88.45 MPG in everyday driving. Will a little display be an option? Please?
Very true I use an Ultragauge very affordable and works great.
http://www.ultra-gauge.com/ultragauge/