I have the same engine in a 1997 Voyager. The engine is a bit buzzy which causes the steering wheel to vibrate. It's more noticeable stopped in drive or in park. A car of that age can have an old worn, warped, rattly dashboard that can also rattle as a result of the buzzy engine. If your hand is on the wheel your watch can also rattle. Some cars are just buzzy and rattly and can't be cured with new motor mounts or plugs-it's normal.
If you are having problems with the idle acting strange (idling high or low for no reason) you might try removing the intake hose and cleaning the throttle body and ICV. These can be done with the car on or off, I would try both and see if your idle problem improves.
I put Champion plugs in my 2.4 (I don't remember what the number was but I think they were copper) and they are fine, so if you have $15 bucks burning a hole in your pocket you can get them, but I wouldn't be in much of a rush.
Your mpg sounds like its within range for all city driving.
If you are having problems with the idle acting strange (idling high or low for no reason) you might try removing the intake hose and cleaning the throttle body and ICV. These can be done with the car on or off, I would try both and see if your idle problem improves.
I put Champion plugs in my 2.4 (I don't remember what the number was but I think they were copper) and they are fine, so if you have $15 bucks burning a hole in your pocket you can get them, but I wouldn't be in much of a rush.
Your mpg sounds like its within range for all city driving.
