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Spark Plug Life
Thread Starter
Le Mans Master
Joined: Sep 2006
Posts: 5,606
Likes: 88
From: Sammamish WA
Spark Plug Life
I have a 2007 C6 LS2 and try to keep it in top condition. I drive it very little - about 3,000 miles per year - and change the oil annually and all other fluids every 5 years.
What about the spark plugs? Do they really last 100K miles? I've noticed my Average MPG is dropping a bit, but it may simply be due to less freeway driving.
Am I overworrying the spark plug life?
Just curious???
What about the spark plugs? Do they really last 100K miles? I've noticed my Average MPG is dropping a bit, but it may simply be due to less freeway driving.
Am I overworrying the spark plug life?
Just curious???
Last edited by last901; Aug 10, 2017 at 06:56 PM.
Race Director
Joined: Apr 2007
Posts: 16,025
Likes: 1,656
From: Toronto, Canada
C7 of the Year - Unmodified Finalist 2021
I have a 2007 C6 LS2 and try to keep it in top condition. I drive it very little - about 3,000 miles per year - and change the oil annually and all other fluids every 5 years.
What about the spark plugs? Do they really last 100K miles? I've noticed my Average MPG is dropping a bit, but it may simply be due to less freeway driving.
Am I overworrying the spark plug life?
Just curious???
What about the spark plugs? Do they really last 100K miles? I've noticed my Average MPG is dropping a bit, but it may simply be due to less freeway driving.
Am I overworrying the spark plug life?
Just curious???
Intermediate
Joined: Apr 2016
Posts: 47
Likes: 5
I've run Platinum plugs in other vehicles for the last 25 years,and run them up to 90000+ miles of normal driving... I don't see where the corvette engine would treat them any different......as long as you aren't tracking the car.
What do others say?
Tom
What do others say?
Tom
Team Owner
Joined: Aug 2006
Posts: 25,105
Likes: 3,156
C6 of Year Finalist (appearance mods) 2019
OEM are Iridium and claimed life is 100,000.
I changed mine at 95,000 and wished I had done them at 80,000. Did my second change at 175,000 and the plugs looked much better than the original set.
Original set were clean and dry but worn down more than I would have liked. So 80,000 intervals it is for me.
I changed mine at 95,000 and wished I had done them at 80,000. Did my second change at 175,000 and the plugs looked much better than the original set.
Original set were clean and dry but worn down more than I would have liked. So 80,000 intervals it is for me.
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Drifting
Joined: Mar 2003
Posts: 1,771
Likes: 141
From: Kaukauna WI
^This. If your car is stock, then go with stock iridium plugs and you'll get years and years of use based on how you drive the car. If you have mods, you'll have to at least check them more often to see if they're doing ok. The more mods, potentially the less life. All depends on the tune and parts that were modified.
Le Mans Master
Joined: Oct 2000
Posts: 6,507
Likes: 723
From: Sausalito CA
The plugs are more than likely still good....even their gap...at your 3K miles per year for 11 years.
It can be recommend after five years to remove and replace the plugs to breaks any aluminum to steal metal electrolysis.
It could also be possible that a spark plug "puck" has fallen off. So a visual inspection can be a good thing.
I don't think you have a plug related drivability/ fuel economy issue.
Have fun.
It can be recommend after five years to remove and replace the plugs to breaks any aluminum to steal metal electrolysis.
It could also be possible that a spark plug "puck" has fallen off. So a visual inspection can be a good thing.
I don't think you have a plug related drivability/ fuel economy issue.
Have fun.
Le Mans Master
Joined: Jan 2006
Posts: 6,642
Likes: 450
From: Texarkana Texas
At least 100,000 +++. My 1995 Chevrolet pickup had 110,000 on it when I changed the plugs and they still looked brand new, so I'm guessing your 2007 Corvette will last 150,000 + miles. With only 35,000, I certainly wouldn't worry about them.