i ve got a sport which is pretty much similar to your FR enginewise which is now on revo stge 2 , fuel wise on a run to work 60-65 for 22 miles the mpg hasnt really changed , averge 33-34 , but when you want some fun with the extra power it will obviously drop loads . I dont think theres many on the forum who regret remapping it totally transforms your motor and makes your grin get bigger and bigger !!!