Originally Posted by
kowaltoboggan
My 2005 has 120000 kms on it and saw no indication the plugs had been changed, so I changed them with plugs from needswings. As above, some of them were harder to get out. I was surprised at the smoother idle that was immediately noticeable. Attributable to plugs, dielectric grease in connections, firmly connected boots, the TLC throughout the job? Who knows, but am glad I did it.
At just close to 100,000 miles, my Graphite started missing and throwing O2 codes. 12 plugs and 12 plug wires ended all that. I'd not realized how crappy the car was running until after the work was done - conclusion: 100,000 miles (160km) is way too long to leave them in there.
Additionally, a fifteen year old car with that mileage on it should get plug wires as well as plugs.