Hey all

I've a 2005 2.3 6 Sport, all standard stuff. Getting a bit hacked off with the fuel cost v performance. Travelling 20k miles pa now, so need to sort the problem asap.
I don't mind the fuel cost, if it goes like stink...power is delivered nicely, only.
I'm hoping to save fuel and boost performance - I've looked at chips and fuel line devices, plus air filters all claiming to do what I want.
Any ideas on what does actually work?