Ya'll continue to slay me! How many threads are going to be created on this pipe dream with all sorts of gonna do this and gonna do that and a whole lot of nothing being done because it can't? The vehicle has been out for over 11yrs and those who got it first would have corrected this by now. It will never win any MPG awards without changing the facts.

Fact: It's heavy @ 3955 pounds
Fact: It's underpowered for that weight @ 215 HP
It's power to weight ratio = 0.0543615676359 (larger, whole numbers are better for efficiency)
AND it's four wheel drive (do away with the 4WD and it becomes very difficult to control, even with the stock engine)

So, aside from running full air pressure in the tires, flowing more air in and out of the engine (w/o over doing it - no 3"+ pipes), driving properly, and correcting your mistaken calculations for non-oem tire sizes, it's gonna be what it is.

You bought the wrong vehicle for MPG and performance w/ one of a kind styling. If you spend $4500 to put in a bigger and more efficient motor AND drivetrain, it 'll take you four+ YEARS to realize the savings IF you can gain even a 10mpg increase doing so.

And since most of the chatter is from those who bought into this vehicle at WELL below sticker unlike the rest of us, I don't see ANY ONE putting 50%+ of their purchase price BACK into an 8+ yr old high mileage vehicle. But then again they sell a LOT of Tornados and Fuel Magnets.....

You're on the planet for a finite time: either enjoy what you drive or drive a Prius and STFU! "The real question is, when you turn your car on, does it return the favor?" Or it just a generic device to get you from point A to B?