Product information
Spark Plug Types
The following table gives an example of the characteristics and service life of resistor spark plugs when used in a modern unleaded engine:
| Type* | Centre Electrode | Ground Electrode | Service Life ** | Benefits | |
| Nickel Alloy | Nickel | Nickel | 20,000 – 40,000 kms | Standard style Spark Plug |  |
| Nickel Alloy (V-Groove) |
Nickel | Nickel | 20,000 – 40,000 kms | Improved ignitability due to sparking at periphery of the electrode |  |
| Iridium IX | Iridium tip | Nickel | 60,000 kms | Long service life and even better ignitability due to a small diameter centre electrode |  |
| Laser Platinum | Platinum tip | Platinum pad/chip | 100,000 kms | Extremely long service life. High ignitability due to fine tipped centre electrode |  |
| Laser Iridium | Iridium tip | Platinum pad/chip | 100,000 kms | Extremely long service life. Improved high ignitability due to fine tipped centre electrode |  |
| DFE Iridium (Double Fine Electrode) |
Iridium tip | Platinum tip | 100,000 kms | Superior ignitability due to fine tip centre and ground electrodes. Excellent service life. |  |
| *NGK Spark Plugs are designed to OEM requirements and as such, a variant of each of the above styles may not be available as it may not be an OEM requirement. **Please note that the service life is provided as a general guide and may vary due to vehicle driving conditions. |
|||||