How often do you change plugs
Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
Originally Posted by Midnite 88
I change mine usually about once a year, whether they need it or not.
Mike
Mike
He also says that the antifrezze is good for 5 years and to change it is a waste of money.
I change plugs every 25k miles. Antifreeze yearly and oil every 3-5k miles.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
I can't believe 100k, I think it depends on the condition and mileage. I know my valve seals need to be replaced because of the start up smoke after it sits for a day or so. I wonder if that causes them to foul?
Drifting
Joined: Nov 2002
Posts: 1,365
Likes: 3
From: Huntsville AL
For a daily driver, I wouldn't touch 'em unless the car starts running rough, or your gas mileage drops significantly.
As for the guy that said changing them under 100k miles is a waste of money, well, he's right if they are still sparking. Some cars may have oil burning or rich running issues that might cause the plugs to start misfiring before 100k. But if they're still firing, replacing them won't gain you a thing.
Those things are a beeyatch to change; you don't want to do it any more than you have to.
As for the guy that said changing them under 100k miles is a waste of money, well, he's right if they are still sparking. Some cars may have oil burning or rich running issues that might cause the plugs to start misfiring before 100k. But if they're still firing, replacing them won't gain you a thing.
Those things are a beeyatch to change; you don't want to do it any more than you have to.
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Pro
Joined: Oct 2003
Posts: 732
Likes: 2
From: Baxter MN
Changing plugs is a miserable job to do in my '91. I buy the best I can get - AC Delco Rapid Fires. I just changed them this summer. I'll probably make this a once-ever-three-years kind of task. With my driving style that amounts to about 25000 miles.
Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
The problem with 100,000 plug changes is the gap increases
with every 10k miles of driving. Eventually the gap becomes to big for even todays high energy ignition systems to overcome.
Changed mine at 75k and it was like a new car.
with every 10k miles of driving. Eventually the gap becomes to big for even todays high energy ignition systems to overcome.
Changed mine at 75k and it was like a new car.
