CEL P0300 '04 Intrepid

Got a Check Engine Light today It is showing P0300 "Random Misfire" in a 2004 Intrepid 3.5 with 54K miles. Drives normal. Ex feds copcar. I bought at 40K 1 1/2 year ago. It was a patrol car at Fed. Prison Hosp In Ft Worth, Texas. I cleared the code and wondering if I should think about buying a new set of sparkplugs?
Bryce

It sure wouldn't hurt, especially if you are unsure about the mileage on the current plugs. Our 3.5s always liked Champion coppers.