I got my Cavalier with 180k on the engine. I removed the production original iridium spark plugs, with no misfires! They are Ac Delco branded but look like NGK Laser Iridium, were stamped made in Japan.
Replaced with the same plug.
Its hard to see, but the laser iridium should have a platinum puck on the ground strap, they sit pretty flush and dont stand out like the ruthenium.
At this point the ruthenium is a pretty new product. I'd feel more comfortable with the proven Laser iridium until these ruthenium plugs get some real world high mileage field testing.
Replaced with the same plug.
Its hard to see, but the laser iridium should have a platinum puck on the ground strap, they sit pretty flush and dont stand out like the ruthenium.
At this point the ruthenium is a pretty new product. I'd feel more comfortable with the proven Laser iridium until these ruthenium plugs get some real world high mileage field testing.