I recently (well a month or two ago) spruced up my 7G with NGK plug wires, Bosch +2 plugs, oil change with mobil 5-30 oil and added an STP additive, new Fram air filter, the PCV valve is also new.
The car lately has seemed sluggish and has very low gas milage. The car doesn't run rough and doesn't have any misfires.
I have no clue where to start to find the problem. Any suggestions? And yeah, I plan to put in some NGK plugs soon, just plain coppers I assume since I have no mods on my car.