V6 repalcement plugs
I had an even mix, 3 of each, of NGK and Denso plugs in my '04 V6. I changed the plugs out at 41,000 and wouldn't think twice about running the stock Denso plugs out to 45,000. The NGK plugs had opened up to a gap of .052" and the Densos were at .045" or just .001" over the...