Does anyone know what the OEM plugs are in a 2006 Monte Carlo SS? I'm trying to find out if they are platinum plugs or not.

 

Yea they are AC Delco platinum plugs

 

They may be iridium plugs. The factory plugs in my 04 Dale Jr were iridiums.

Wayne

 

Hmm coulda swore they were platinum but now that you mention iridium I'm not sure lol been awhile I guess

 

What kind of mileage can you get out of iriduim plugs?

 

Iridium is supposed to be good for 7 years or 100k miles.

Platinum is a little less life than that, but they are both a lot longer lasting than yearly copper plugs lol

 

My factory plugs still looked good and not much different than the new ones I was putting in. I've read that they are good up to a 150,000 miles and that platinums are good for 100,000 miles. I don't know how accurate that info is though.

Wayne

 

I've pulled factory plugs that were dual branded AC Delco and NGK from cars with 150,000+ miles. I assume they were iridium (especially given the mileage and how well the car ran). I have been using NGK Platinum plugs from Rock Auto (shipped to my door, they are about $3 a plug, awesome deal and they perform great).

I stay away from BOSCH plugs (too many bad experiences with them). I've been a die-hard "AC Delco" plug guy, and recently went to NGK (price and reading good information). The first car I put them in was my wife's Impala, my first time seeing dual branded plugs. Seeing AC Delco outsourced to NGK helped make me feel better that I was putting NGK into the car. Since then, I have put NGK into a total of 3 GM v6 cars. Each one performs outstanding!!

Locally, the cheapest platinum plug would be over $6 a plug (iridiums are even more).

 

Ok, my car just passed over 57k miles so sounds like I should be good for a while haha

 

Remember my post gave a year range. Stuff does go bad over time, not just over mileage. Iridium is supposed to be good for 7 years, and you are at the 7 year mark.