MetroMPG -
That's pretty neat. It's got so many of the doo-dads we've been implementing in our cars that I believe it can approach 58 MPG @ 55 MPH . I am guessing that they are using the OEM guage :
2011 Chevrolet Cruze Eco system overview and Camshaft sprocket - Auto Owners Manual - Workshop Manual - Maintenance Manual - Wiring Diagrams - Detechno.org
CarloSW2