My 2002 Camry's spark plugs replacement is coming up due. (105,000 per manual, currently at 100,400). I am a strong believer of using OEM plugs spec'd in by the engineers that designed the engine, and installed by the factory. The factory plugs I have work great and I cannot feel any degradation over the 100K. The OEM plugs would be NGK or Denso's Laser Iridium. That said, I notice that both NGK and Denso offer a finer tip version of their OEM style plugs. They claim the finer tips will improve firing efficiency, but the plugs won't last as long. Does anyone have any experience with their fine tip offerings? They can be had for a 6.99 (8.99 for standard). Do they offer any observable performance enhancement? If chosen, I would probably replace them at 50K, instead of 100K for OEM.