I just had to replace my injectors a month ago and since then my mileage went from 21.4-22.8 down to 19.3 -19.6 no other changes I put in brand new from Bosch injectors and every thing is running beautiful and plenty of power but the mileage drop kind of makes me wonder what happened I have no leakage or funny noises either I did adjust valves while apart and all were a little on the loose side but thats it, any Ideas?????