andypdbz

iTrader: (1)

i got new plugs on my car at 36K, only had it since 24K
well it turns out the plugs had never been changed and the car was running fine. how long do those factory plugs last? and how long before you guys changed yours?

Trev_SS

iTrader: (17)

i went 50000 thousand before i changed mine

blueorb

Does time vs. miles make a difference? I have an 02 with 27,000 miles. Does the fact that the car is 4 yrs old matter or is it strictly a miles issue?

jmm98LS1

iTrader: (28)

I replace my tr55's once a year whether they need it or not. The car only sees less than 3k miles a year, but most of it's very "spirited" .

davered00ss

iTrader: (4)

I change mine yearly weather they need it or not.

RPM WS6

iTrader: (3)

Not sure about the stock LS1 plugs, I always pull them right away and put in NGK TR55s.

TR55s should last 25-30K miles.

pjb

iTrader: (2)

I went over 125k on my original plugs. it still ran fine and never saw any drop in fuel mileage. I decided to change them because I heard that the plugs could seize up in the aluminum heads and do damage trying to get them out. mine were tough to break loose, but once they were loose they spun right out. AC Delco platinums, anti-seize compound, dielectric grease on the plug boots and I should be set for another 100k (which the car will never see because it stays in the garage now).