Pulled a plug and the gap was pretty gross. Since the car has so many miles and the plugs looked so bad, I put in new plugs and wires. Autolite wires and Bosh Platinum+4 plugs.
The overall performance feels improved - smoother acceleration. I haven't tracked my gas mileage (I don't drive very economically). Haven't experienced the miss since - so far, so good! Thanks.
