Spark Plugs
Joined: Apr 2010
Posts: 12,601
From: Mentor, Ohio
I prefer AC Delco. Stock ones work great and you won't go wrong.
FYI - When my wife and I bought a '05 Impala with the 3400 v6 in December with 150K on it, I changed the factory plugs on it. This car is a winter beater for her and call me cheap, I was a bit grumpy to pay $7+ a plug for Iridiums when I've ran copper and platinums in my pre-2000 cars. I decided to take a gamble on NGK Platinums for about $2.50-$3 a plug.
What I found was they looked identical to the AC Delco. I also noticed that despite the stem having AC Delco stamped in blue on it, the metal band above the nut had NGK scribed in it. Apparrently, AC Delco has outsourced some products to NGK.
FYI - When my wife and I bought a '05 Impala with the 3400 v6 in December with 150K on it, I changed the factory plugs on it. This car is a winter beater for her and call me cheap, I was a bit grumpy to pay $7+ a plug for Iridiums when I've ran copper and platinums in my pre-2000 cars. I decided to take a gamble on NGK Platinums for about $2.50-$3 a plug.
What I found was they looked identical to the AC Delco. I also noticed that despite the stem having AC Delco stamped in blue on it, the metal band above the nut had NGK scribed in it. Apparrently, AC Delco has outsourced some products to NGK.
Joined: Jun 2009
Posts: 356
From: St. Louis
when i decide to change my plugs in the rear future, i'm gonna put stocks in. but this time i'm gonna try something a little different. i'm gonna grind back the ground so you see more of the electrode when looking down into it. it's and old trick drag racer use to burn all the gas up in the cylinders. the only problem with this is you plugs don't last as long. no big deal since i plan on doing some mods this year and will need colder plugs anyways.
