Ok...then if they are only for extended life of the plug. I don't care about double platinum then. I can buy the Autolite single platinum for half much cheaper.
Ie.
Single platinum: 6 plugs for $8
Double platinum: 6 plugs for $24
Since I already invested so much money in the car this past year, I will go with the single.
Ps. FYI, I just replaced the O2 sensor upstream and it cost $130. I also use the Mobil 1 5W30 synthetic oil...another costy investment. I have new wires, ect ect.
In addition, I still get that ticking noise. It sounds like the lifter(s) are sticking, how do I correct that without major overhaul?
