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E3 Spark Plugs E3.68 Premium Automotive Spark Plug w/DiamondFIRE Technology (Pack of 1)

4.5 4.5 out of 5 stars 378 ratings

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Brand E3
Core Material Copper
Gap Size 0.04 Inches
Thread Size 14mm
Top Material Type Alloy Steel

About this item

  • Automotive spark plug that fits a variety of domestic applications, designed to increase power, reduce fuel consumption, and improve hydrocarbon emissions
  • E3's patented DiamondFIRE edge-to-edge electrode provides maximum performance with increased efficiency, and a faster more complete burn
  • Designed with colder heat ranges to enable performance modifications, and contains Yttrium-enhanced alloy for a reduction in side wire temperature for less pre-ignition
  • Includes one (1) E3.68 spark plug with a limited lifetime warranty
  • Primarily used in a wide variety of automotive and truck applications
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Additional Details

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E3 Spark Plugs E3.68 Premium Automotive Spark Plug w/DiamondFIRE Technology (Pack of 1)
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Price$6.20$5.09$6.99-40% $6.99
List:$11.71
Delivery
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Customer Ratings
Value for money
4.1
4.0
4.2
4.4
Mileage
3.8
4.0
4.2
4.0
Longevity
3.8
4.0
4.1
4.5
Sold By
Amazon.com
Amazon.com
Amazon.com
Amazon.com
compatible vehicles
Car
Motorcycle
Motorcycle
number of items
1
1
1
1
gap size
0.04 inches
0.03 meters per meters kelvin
0.04 inches
0.03 inches
thread size
14mm
12 millimeters
14mm
core material
Copper
Copper
Copper
Copper
top material
Alloy Steel
Alloy Steel
Alloy Steel

From the manufacturer

E3 Spark Plugs

The DiamondFIRE ground electrode configuration increases the amount of combustion pressure created during each power stroke of an engine, which results in a marked increase in power output, fuel economy, and reduced emissions in all gasoline engines.

Smoother Acceleration and Idle – The faster flame propagation initiated by the Patented DiamondFIRE ground electrode results in a more complete burn of the fuel/air mixture.

Energy – More pressure is created against the cylinder and more of the available fuel is put to work. Power is improved 3%-6% on average in typical operating ranges. Results may vary.

Efficiency – Another benefit of E3’s faster flame propagation is less fuel is wasted, resulting in improved fuel efficiency. Lab and Dyno testing typically results in 3%-4% improved Brake Specific Fuel Consumption (BSFC). Results may vary.

Ecology – E3’s more complete burn drastically reduces carbon emissions and carbon build up.

Why Do You Need E3 Spark Plugs?

As the designated catalyst for the ignition of fuel in gasoline powered cars, trucks, motorcycles and small engines, spark plugs are a small, but constant factor in the workings of the vast majority of motorists on the road. What these motorists may not know is that their choice of spark plug could play a significant role in reducing the level of greenhouse gases that their vehicles give off, as well as increasing overall fuel economy and potential power output. This is where E3 Spark Plug's DiamondFire technology comes in.

Key Features

Nickel Plated Terminal End- Corrosion protection at the main contact point with your engine's ignition system.

Projected Insulator Tip- We have the deepest projections in the Industry, promoting better spark-zone refreshing between power strokes, without any negative side effects.

Spark Gaps Tailored to Your Engine- Unlike other 'premium' spark plugs that use a 'one size fits all' gap policy, E3 Spark Plugs have carefully optimized spark gaps chosen to maximize performance for each application.

E3 Spark Plug's patented ground electrode design provides for more efficient burning of your vehicle's air/fuel vapor, leading to more pressure in the cylinder. These improvements are measurable, and confirmed as compared to the designs found in existing spark plugs. The DiamondFIRE electrode projects the spark further into the combustion chamber, bringing it closer to the most robust air/fuel mixture. The initial combustion wave leaves the spark area at supersonic speeds, and the elevated edge provides a chimney effect so the next round of air/fuel mixture gets into the spark zone more easily.

The E3 ground electrode design forces edge-to-edge spark discharge, which is the best way to get a spark to leave a surface. Sharp edges are better at initiating electron migrations, and these accelerated electrons collide with matter inside the spark zone to release additional electrons. This design ensures that the whole population of electrons works to create a plasma channel through which the spark current flows more easily, resulting in an increase in both power output and fuel economy, while reducing emissions in gasoline engines and the build-up of carbon deposits on engine surfaces.

Our Products

Automotive Spark Plugs

E3 automotive spark plugs utilize the latest E3 technologies to help engines operate more efficiently by burning fuel more completely. Get more power, better fuel efficiency and a faster/smoother acceleration. E3 Automotive plugs come with a 5 Year/ 100,000 Mile Warranty.

Small Engine Spark Plugs

E3 small engine spark plugs have the same patented Edge-to-Edge DiamondFIRE ground electrode that has been proven to burn fuel more efficiently. Bring your L&G equipment to life, with quicker starts, more power, better fuel efficiency, and lower emissions. E3 Lawn and Garden plugs come with a limited Lifetime Guarantee.

Power Sport Spark Plugs

For near perfect combustion, put in a set of E3 power sports spark plugs that are Born to Burn! Featuring the patented DiamondFIRE ground electrode, E3 power sport plugs provide more power, quicker starts, better fuel efficiency and lower emissions. E3 Power Sport plugs offer a defect warranty for the 90 days.

Racing Spark Plugs

E3's unique DiamondFIRE ground electrode helps to create more turbulence in the cylinder, and facilitate a faster flame growth. The result is more complete combustion, which results in more power and better consistency. E3 Racing Plugs cover a wide variety of Motorsports applications.

Product Description

Product Description

The E3.68 auto spark plug is a 14mm, 1.000” reach plug with a gasket seat. It fits a wide variety of late model applications, especially Hemi applications. E3.68 is widely stocked in automotive retail stores. E3 automotive plugs have three legs securing the DiamondFIRE electrode to the shell. This allows for excellent heat transfer, and helps to create more turbulence in the cylinder. The patented DiamondFIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use. The unique ground electrode and full-size center electrode also provides optimal performance for a guaranteed five years or 100,000 miles. Part Number: E3.68; Resistor: Resistor; Hex Size: 5/8"; Thread Reach: 1.000"; Thread Diameter: 14mm; Seat: Gasket; Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted. Our unique DiamondFIRE open design forces air gap discharges, creating the preferred edge-to-edge spark path. The design allows replenishment of the spark zone with a fresh fuel/air charge, and exposes the flame front more directly to the piston head than other plug designs. This distinctive spark plug design has proven to simultaneously increase engine power output, reduce gasoline consumption, decrease hydrocarbon and carbon monoxide emissions from the engine, and materially extend the life of the spark plug. Our lawn and garden spark plugs help engines operate more efficiently with a faster and smoother acceleration.

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Technical Details

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Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

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E3 Spark Plugs E3.68 Premium Automotive Spark Plug w/DiamondFIRE Technology (Pack of 1)


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What's in the box

  • (1) Spark Plug
  • Looking for specific info?

    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    378 global ratings

    Customers say

    Customers like the performance, value, and ease of installation of the spark plug. For example, they mention that it works great, is affordable, and is a great investment. That said, some complain about the size and quality.

    AI-generated from the text of customer reviews

    42 customers mention31 positive11 negative

    Customers like the performance of the spark plugs. They say that the engine runs better, has smoother acceleration, and produces more power. Some customers also mention that the sparkplugs are easy to install and do not cause a power or speed change.

    "These work well." Read more

    "...increase or better gas mileage; however, I did get some very nice spark plugs that work well. The price was excellent and I would buy them again." Read more

    "...I went back to NGK ( OEM plugs) the car runs smooth and great acceleration and good gas.DO NOT RECOMMEND ON LATE MODEL BMW" Read more

    "...But I definitely don't appreciate the longer cranking at start. Don't bother with these plugs.Vehicle: 2007 Toyota FJ Cruiser (4.0L V6)" Read more

    9 customers mention9 positive0 negative

    Customers appreciate the value of the spark plug. They say it is a great investment and a nice plug for the price.

    "...The price was excellent and I would buy them again." Read more

    "...No gapping required with the electrode design. They were significantly cheaper than the OEM NGK platinum plugs at only a fraction of the cost, even..." Read more

    "Nice and affordable product. Needs better packing and shipping method although...." Read more

    "...I did notice an increase in throttle response. Really nice plugs for the price. Just for reference I drive a 2012 Kia Forte Koup SX...." Read more

    6 customers mention6 positive0 negative

    Customers find the installation of the spark plug to be easy. They mention that the plugs are simple to install as regular spark plugs, and come ready to install. They also say that the engine immediately began to run normally after installation.

    "...They were as simple to install as regular spark plugs. No gapping required with the electrode design...." Read more

    "Relatively easy install on my Porsche Cayenne Turbo (957)...." Read more

    "...No problems installing or starting. I did notice an increase in throttle response. Really nice plugs for the price...." Read more

    "...Smoother idles.Better gas miles.Easy to install.Not notice power change or speed change." Read more

    23 customers mention14 positive9 negative

    Customers are mixed about the quality of the spark plug. Some mention that they are good quality spark plugs, while others say that they break down on the plug.

    "Works as intended and promised. On independent tests, outperformed better brands, including original Japanese brands. Expensive but worth it" Read more

    "...my OEM plugs on BMW E90 328i 09 with these E3 plugs - did not last as much as 6 months...." Read more

    "Good quality spark plugs, did not notice any improvement in performance or gas mileage." Read more

    "These plugs are great. They did everything they claimed to do in my 2010 Toyota Tacoma...." Read more

    10 customers mention0 positive10 negative

    Customers are dissatisfied with the size of the spark plug. They mention that it doesn't fit their vehicle as specified, it's too big, and there's wasted space.

    "Description said it would fit my 2011 Sonata but they did not fit. Thankfully they will fit my wife’s RAV4 so I can still use them." Read more

    "E3.68 does not fit in the HR motor. 2008 350z vQ35 motor uses a different plug...." Read more

    "Not sure on performance. But I do know that it doesn't fit nissan versa. Stated that the vehicle compatibility was good but wrong...." Read more

    "...Too much wasted space" Read more

    They are alright.
    3 Stars
    They are alright.
    These spark plugs are decent they lasted about 100k miles, then I started experiencing misfires and rough idling. There was significant corrosion and break down on the plug. I would recommend sticking with NGK or an OEM spark plug.
    Thank you for your feedback
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