Ew..i just found out how much of a PITA it is to get to the plugs..guess i'll search for an easy way...but in the meantime, i got the rear rotor trailing plug out and replaced it cuz its the easiest to get to..and holy ****..the top was completely black, w/ some gray on it, there was grease and oil all over it, the threads on it were dark brown (rusted) and the white part which the wires go into were also dark white w/ rust around the nut...ew..i know they havent been replaced since i got the car (august 2001)...so how long do you guys guestimate they've been in there to be all black and some gray w/ rust?

 

i'd ay at least 25k

james