Sigforty

I am making it around to changing my Tr55s for the first time since I installed them. I have ran almost 27,000 miles on these plugs and some of them look rough. I am curious as to what mileage other are getting with them before replacement.

Ferocity02

iTrader: (60)

Thats a good amount of miles on them, I'd change them for sure.

Sigforty

I am changing them I was just wondering how far everyone else goes on them.

INMY01TA

iTrader: (1)

I change em every other year but it's not a daily driver.

chris2000ss

iTrader: (9)

I change them every year also.but its not a daily

Z28_DAD

iTrader: (18)

i change them every spring. they get fouled just starting it for a couple minutes all winter.

black00TA

iTrader: (3)

i have around 25k on mine and i drive my car year round.

i know its time to change them as i figure they are only good for maybe 20k. plus its starting to get a little rough in low rpms

Coy

iTrader: (4)

Every 15,000

ws6togo

iTrader: (1)

I had my first set in for 16k. Rebuilt motor and have about 9k on the new ones. Will run them through the winter and change them in the spring. Sounds like what others are doing. My id DD also.

LS1-450

iTrader: (33)

I change yearly or every 15K, whichever comes first.

Sigforty

Looks like I will start marking them down for 15k changes. I figure it is better to be safe then sorry. Plus the plugs looked nasty with 27k on them.