I have a 4.6L '98 ext. cab. I was wondering if anyone has tried experimenting with gas mileage using the superchip programming. My truck only gets about 14 miles to the gallon. And on the other end what kind of power can you get the 4.6 up to?

 

Dude just search the chip/programmer forum. My chip helped my MPG. I average 15 in the city and always drive with my foot in it. I have the 5.4 also. With the 4.6 you should be able to average 15.5 pr or 16 MPG easy.