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I don't know what to write about this since its only been a few hundred miles since installed. The NGK laser Iridium is an upgrade from the factory scion TC non laser NGK Iridium. It installed properly and worked like it should. Our Scion had 121,000 miles on the original NGK Iridiums so it shows that they lasted past the manufacturer's scheduled maintenance guide so I have confidence these spark plugs will outlast the actual car itself.
Verified purchase: Yes | Condition: New
My only mistake was switching to a name brand platinum+4 thinking 4 tips will give me better mileage. Wrong. The name brand platinum+4 consumes 20% more gas than NGK iridium. After few months I switched back to NGK 4589 which is the original spark plugs of my 2004 Camry. Better performance after 2000 RPM plus better fuel economy. I can tell because I drive 120 miles a day.
Verified purchase: Yes | Condition: New
Excellent product and a very reasonable price. Can't go wrong with NGK!!
Verified purchase: Yes | Condition: New
Much better than the stuff the prior owner had in the car and meets/exceeds manufacturers spec
Verified purchase: Yes | Condition: New
Yeah, my RAV4 did need new plugs. I noticed a big difference right away. Getting the better quality plugs increased my gas mileage by about 3+ miles per gallon... not bad.
Verified purchase: Yes | Condition: New
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