NGK G POWER Spark plugs

I just picked up some ngk g power platinum plugs from Napa are they gonna be good for my 01 Lumina or did I skimp to much on the plugs. Id rather change after 60k than 100k but i donno after reading up a bit im alittle skeptical, as it seem these engines are sensitive. Maybe Im overthinking it.

Thanks, John

I use ist on my 3.8 Engine. No problem at all. I replace it all 5 years, and the engine runs smooth before I changed these.

that was a bigger job than i anticipated! Thanks for the reply yeah im glad i picked them up, nice and smooth.