Lexus_Racer Posted June 9, 2005 Posted June 9, 2005 does anyone know for sure if Iridium spark plug is more powerful or if Copper spark plug is more powerful for a GS400. Different car work better with different kind of spark plug, so i was just wondering which would be more powerful, Iridium or Copper, thank you.
dcfish Posted June 9, 2005 Posted June 9, 2005 does anyone know for sure if Iridium spark plug is more powerful or if Copper spark plug is more powerful for a GS400. Different car work better with different kind of spark plug, so i was just wondering which would be more powerful, Iridium or Copper, thank you. ← Dealer says use iridium in the 400 and platinum in the 300.
Lexus_Racer Posted June 9, 2005 Author Posted June 9, 2005 does anyone know for sure if Iridium spark plug is more powerful or if Copper spark plug is more powerful for a GS400. Different car work better with different kind of spark plug, so i was just wondering which would be more powerful, Iridium or Copper, thank you. ← Dealer says use iridium in the 400 and platinum in the 300. ← thankz for info. :)
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