Lives up to the Sales Hype! Gas and Diesel both!
Programmed my 2003 Lincoln Navigator 5.4 liter engine after upgrading to a standard K&N filter (replaced the stock filter only), mileage went up 1.8 mpg after programming. Then used the Cortex Super on my 2008 Ford F250 Super Duty 6.4 liter diesel (you are allowed 2 vehicles for programming). Mileage went up over 2 mpg on the diesel. Unit was easy to update, easy to use. Pricey but worth it, will pay for itself in less than a year, especially with diesel at $4 plus per gallon.
A must Have!!
Easy set up and instructions that go along with the item, however; the casing shipped did not fit my 2001 Navigator. I had to take off the casing and find a place on the dashboard to velcro it to. I installed right on top of my steering column cover very easy. I'm running level 2 and have noticed better response from the vehicle, and gas mileage since to have improved, although I'm still testing it on that. The DTC clearing feauture is a nice to have tool as well as that of the diagnostic portion. The dysplay is nice and very helpful to monitor engine performance.