Friday, June 3, 2011

How often do spark plugs need to be changed?

On a 2002 Jeep Liberty, 3.7L, 6cylinder, with 59,150 miles. Is there a recommended mileage that the spark plugs should be changed at?How often do spark plugs need to be changed?your owners manual will tell you for sure but most new vehicles are good up to 100,000 miles unless your experiencing hard starts and loss of fuel mileage.How often do spark plugs need to be changed?Plug life depends on the plugs if nothing is amiss in your engine.



Platinum and Iridium plugs can go a long time without needing to be replaced. I usually run plain jane copper plugs and replace every 12,000-15,000 miles based on the amount the gap has changedHow often do spark plugs need to be changed?you can go 90000 unless you have a seal leak and its getting on the plug and causing a misfire but now plugs go forever

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