Currently looking at replacing spark plugs on the white one at 113k miles. Going with the same platinum iridiums it had before. Having misfires most likely caused by a leaky valve cover gasket. hopefully i won't get raped in the process. Getting code P0301 of a Cylinder 1 Misfire.
Bosch spark plugs 06H905601A, FR6KPP332S: $14.99x4 @ O'Reilly's
Getting it looked at soon at Dubsquared in Arlington, Tx. dubsquared.com