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How long do spark plugs last?
Posted: Tue Jul 22, 2014 5:20 pm
by Bob Of Burleson
I've had a set in a four-banger for 65,000 miles and never had a problem. Should I change them?
Re: How long do spark plugs last?
Posted: Tue Jul 22, 2014 5:27 pm
by Kiamichi
I replaced the ones on my Ranger at 100,000 although the mechanic said it wasn't necessary.
Re: How long do spark plugs last?
Posted: Tue Jul 22, 2014 5:31 pm
by Bob Of Burleson
Notice any improvement in gas mileage?
Re: How long do spark plugs last?
Posted: Tue Jul 22, 2014 6:01 pm
by Kiamichi
Bob Of Burleson wrote:Notice any improvement in gas mileage?
Negative. The engine burns no oil and they were not at all fouled.
Re: How long do spark plugs last?
Posted: Tue Jul 22, 2014 6:44 pm
by Mark
In today's cars, they may very well last the life of the car. I've seen them with over 200,000 miles and still going strong.
Unleaded gas and fuel injection makes everything in the engines last much longer.
Re: How long do spark plugs last?
Posted: Tue Jul 22, 2014 6:51 pm
by Grassman
Mark wrote:In today's cars, they may very well last the life of the car. I've seen them with over 200,000 miles and still going strong.
Unleaded gas and fuel injection makes everything in the engines last much longer.
Then ethanol fuel is dragging the life span back down.
Re: How long do spark plugs last?
Posted: Tue Jul 22, 2014 10:00 pm
by tx3653
My 2002 Malibu still has the original plugs. It has never had anything done to it repair/tune-up wise. Maybe the main factor is not that it is 12 years old but that it only has 39K miles on it.
Re: How long do spark plugs last?
Posted: Tue Jul 22, 2014 10:14 pm
by PlanoSooner
changed mine in my old tahoe at 150k and saw no improvement.
unless one is fouled, run with what ya got