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Double Platinum; Short Design
DENSO is the pioneer in introducing platinum spark plugs to the automotive aftermarket, but has hardly been content to rest on that achievement. Conventional platinum plugs use platinum for only the center electrode, while the DENSO Double Platinum plug features platinum on both the center and ground electrodes. This precious metal fights corrosion and erosion, ensuring superior spark performance and maximum spark plug life capable of extended operation in excess of 60,000 miles.

  • Platinum center electrode
  • Platinum ground electrode
  • Premium shell construction with machine-rolled threads
  • Sustained spark performance over 60,000 miles
  • Reduced secondary required voltage, increased ignition efficiency

Spark Plug Type Performance Differences

Technical Bulletin for 5.4L 2004-2005 Ford F-150, Expedition, Super Duty & Lincoln Navigator
Resistance5000 Ohms
Ground Electrode Tip DesignPlatinum Chip
Ground ConfigurationStandard
Ground Electrode Core MaterialNickel
Center Electrode Core MaterialCopper
Center Electrode Tip MaterialPlatinum
Gap Size0.050"
Ground Electrode Quantity1
Hex Size16.0 mm
Manufacturer Heat Range16
Seat TypeTapered
Reach18.00 mm
Alternate/OEM Part Number(s): PT16EPRL13

DENSO Warranty Information:
12 months on A/C Evaporator Cores, A/C Compressors, A/C Compressor Clutches, A/C Condensers, Radiators, Fuel Injectors, Fuel Pumps, Fuel Tank Sending Units, Ignition Coils (COP), Alternators, Starters, and Mass Air Flow Sensors. Parts subject to normal wear and tear are not covered (Filters, Ignition Wires, Oxygen Sensors, Spark Plugs, Wiper Blades, etc.). IMPORTANT A/C COMPRESSOR WARRANTY NOTE: In order to ensure that proper warranty credit is issued if needed, the compressor installation instructions must be adhered to. All compressors returned for defect must show proof of purchase of an A/C Orifice Tube (or A/C Expansion Valve), A/C Receiver Drier/Accumulator, and A/C System Flush or a Work Order showing the purchase of these items and that the system was flushed.