hi guys. i have 2005 accord lx 4 cyl. with 278xxx miles. I'm reaching very poor gas mileage. i put a lot of new parts. and everythin its clean mas air flor sensor throttle. and etc. new tune up. new idle valve etc egr itc clean. new filters engine and cabin. and so much more. i own this car for 5 month now. so max i reach in gas its 21 gal for mile in mix drivin. and in the city between 14.75 to 16 mile per gallon. any help please. engine its quite trans shifts good