Denso Iridium Spark Plugs

[thung8888]

I have a 1999 996 C2 and is it a better idea to use Denso Iridium Spark Plugs to replace the OEM plugs?

[nick49]

Providing you use a plug made for the proper application, it makes little difference as to the manufacturer. Some people disagree and use the same logic, Chevy good, Ford bad. Some brands may work slightly better in certain applications only because there is not an exact cross reference between brands. Three different plugs made to interchange will be slightly different in heat range and may perform slightly different depending upon how the vehicle is driven, ambient temperatures, elevation and possibly other factors. Very expensive plugs, if not required for the particular application are of usually no benefit. Precious metal center electrodes like gold, platinium and others generally need less voltage to fire, may generate a stronger spark in higher compression motors, and will generally last longer.

I use Accel plugs in my Harley and they are made by Nippon Denso, an OK plug. I used NGK in the Suzuki GSXR for roadracing. I use Beru in the Porsches, Autolite in the F150 and the Jeep, OEM in the Lexus. I often may choose the most readily available or least expensive.