Has anyone put in a performance chip in their expedition? If so is it worth it?

Thanks,

A friend of a friend did.After he did it he has to use 93 octane gas.Does not run good on the chep stuff.

i PUT ONE IN MY 03 EB AND YES, THERE WAS SOME NOTICEABLE DIFFERENCE IN PICKUP AND SHIFT POINTS. I AM USED TO IT NOW, SO IT'S NOT A SCREAMING DIFFERENCE LIKE I HOPED, BUT IT DOES DO A LITTLE. I ALSO PUT A TRUFLO INTAKE ON IT, AND COMBINED, I GET MUCH BETTER THROTTLE RESPONSE.

IT IS TRUE ABOUT THE 93 OCTANE, BUT I'VE ALWAYS USED THAT ON ALL MY VEHICLES, AS IT IS GOOD FOR THE ENGINE.

ONE NOTABLE:
I WAS SUPPOSED TO SEE BETTER GAS MILEAGE, BUT DIDN'T. IN FACT, IF ANYTHING, IT MIGHT BE A LITTLE WORSE, AND I DON'T STOMP ON IT ANY WORSE THAN I DID BEFORE. SO IF SOMEONE HAS ANY ADVICE ON THAT, LET ME KNOW....

GOOD LUCK. IT'S A CHEAP AND SIMPLE MODIFICATION TO YOUR TRUCK. GET IT ON EBAY THOUGH, DON'T SPEND ALOT.