economy map will work on a fully bolted, meth injected car (lol). It's just very slow and honestly I don't see a point in it. It will stay in Closed loop the entire time... aka 13.X AFR with 13psi boost. Your foot is the best way to control gas mileage. Now, if we had realtime maps it wouldn't be so bad to switch to economy map every now and then or something, but with the flash time, and re-learning of fuel trims it just seems kinda pointless to me. Some don't like the 'jerkiness' of the OTS maps, but you can easily fix the throttle response in 1 or 2 tables in ATR...makes it very easy to drive and liveable.