http://www.ngksparkplugs.com/part_fi...uv/results.asp
For a 1999 grand prix 3.8 k engine tech support at NGK recommend laser platinum vrs the laser iridium plugs for my car. See link above which states OE is iridium. Why are they showing iridium as OE when the car came with platinum ?
I have called twice and gotten this answer from tech which was the same guy. Did not give a reason except that these were the plugs originally supplied to GM. Any one have experience with any of these 2 plugs. Or is there a site where I can get a better answer . The guy on the phone was not that friendly and seemed like he would rather be doing something else.
Sorry if this question is redundant but spark plugs" in the search box does not bring up what I am looking for although its probably because I don't know how to search.
