by MyDodgeDip » Sat Jan 28, 2012 1:23 am
Welcome,
2.2's have been known to knock. So long as your oil keeps getting changed you should be ok. Basically keep up with the routine maintenance (Oil changes, trans services, timing belts, tune ups, filters) and it should be good. As for fuel economy, keep it in tune, air up the tires to 35 or so and most importantly, drive with a light foot.