I bought the Superchip Cortex Tuner for my Ranger about a week ago. I haven't tried the fuel economy mode yet but I have a lot more horsepower and I get the same gas mileage as I did before the tuning. As soon as I have to fill up again, I'm going to try the other setting and I'll let you know how it does. But so far, I don't regret spending the $400on it.

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Murdered out 09' Ranger SLT Supercab 4x4 4.0 V6: 10" of lift...And blah blah blah.