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Denso 5303 IK16 Iridium Spark Plug, Pack of 1 Description:

Denso Iridium Spark Plug Denso’s Iridium power spark plugs help your vehicle achieve unparalleled performance. It alters the belief that a mere spark plug can add power and mileage. This is done by combining an ultra-fine 0.4mm diameter Iridium center electrode with a tapered cut U-groove ground electrode. Iridium conducts electricity better than platinum, however what makes it exceptional is it’s also 6x harder and 8x stronger than platinum. This ultra-fine iridium center electrode provides superior ignition performance during acceleration and top cruising RPM. The U-groove ground electrode creates a larger, brighter flame kernel. The tip of the ground electrode has been tapered which further improves firing performance by reducing quenching. All of these features combine to give more horsepower to your motor. Technical Specifications – 14mm Thread, 19mm (3/4″) Reach, 5/8″ (16mm) Hex Size, Gasket Seat, Resistor, Removable Terminal, ISO height, 0.4mm Iridium Center Electrode, Tapered Cut U-groove Ground Electrode, .044″ (1.1mm) Gap

• Amazon Sales Rank: #2887 in Automotive
• Brand: Denso
• Model: 5303
• Dimensions: 1.10″ h x 3.50″ w x 4.20″ l, .11 pounds

Features

• IK16

Customer Reviews:

Iridium Plugs have not increased my fuel mileage/economy
I bought a set of 6 for my Acura RL to replace the factory laser Platinum plugs. The first week after the replacement, my gas consumption increased from 22mpg to 20mpg. I attributed it to a cold spell that had come by in early October. The second week, it went back to 22mpg. I checked it this week and it has gone back up to 20mpg. I don’t know where people are getting the improved gas performance from. I have not seen any difference between the 99k old laser Platinums and these 30 mile old Iridiums in performance, except that the Iridiums cost a lot more.

Power, better engine performance
Since the spark plugs on my mountain mitsubishi lancer 2.0 felt the difference of the normal wax candles. The originals were in very good condition. The engine now works with better performance at low and high revs, its response is faster, with the same fuel have more power and smoothness of motor.Si you want to save fuel will have to learn to dispense their management style. Excellent product 100% Japanese. The manufacturing quality is perfect. After thinking about purchasing this or another brand spark plugs and less if they are not manufactured in Japan

Denso Iridium Pugs are OK
After reading all the info I could find, purchasing these plugs seemed the right thing to do, despite the increased expense. I have a 1997 Honda Odyssey, 215k miles, top mechanical condition. The plugs provided about 1.4 MPG more on a 480 mile round trip. My biggest expected savings, though, will be realized in the plugs’ longevity. We’ll see.