10 Best Spark Plugs | April 2017

We spent 23 hours on research, videography, and editing, to review the top options for this wiki. There aren't many parts of a car as essential -- and easy to upgrade -- as its spark plugs, which require routine inspection and replacement for proper vehicle operation. And like any car part, there are a variety of aftermarket options out there for increasing the efficiency and longevity of your motor. We've put together a list of great options, ranked in terms of cost, quality, and performance. Skip to the best spark plug on Amazon.
10 Best Spark Plugs | April 2017
Overall Rank: 8
Best Mid-Range
Overall Rank: 3
Best High-End
Overall Rank: 1
Best Inexpensive
By far the most cost-effective, copper core plugs offer high performance and a relatively long life span at the most affordable price. These NGK Standard units protect against carbon buildup and pre-ignition damage and are a solid option for the budget-minded car owner.
  • made by industry leading company
  • safe and reliable
  • not as high quality as other types
Brand NGK
Model D8EA
Weight 1.4 ounces
Rating 3.6 / 5.0
If you own a car or truck made by Ford, many of which feature coil-on-plug ignition systems, the Motorcraft SP-479 comes highly recommended as a replacement for your OEM spark plug. They're cheap and have a high melting point, making them particularly resistant to erosion.
  • platinum tipped
  • rated to last up to 100k miles
  • improve vehicle's mileage
Brand Motorcraft
Model SP-479
Weight 6.4 ounces
Rating 3.9 / 5.0
Longer-lasting but not as conductive as their copper counterparts, iridium plugs, like the Denso SK20HR11, are a good option for cars that run optimally at lower temperatures. This model also features a platinum-tipped ground electrode, making it especially durable.
  • oem replacement quality
  • allow for smooth acceleration
  • pricier than copper plugs
Brand Denso
Model SK20HR11
Weight 8 ounces
Rating 4.0 / 5.0
Made for the small engines of lawnmowers and tractors, the Champion J19LM Copper Plus resists fouling and corrosion in cold temperatures, and is also effective for use on generators and marine vehicles. It's a good idea to keep a few of these lying around the tool shed.
  • highly conductive
  • instructions included
  • not appropriate for cars and trucks
Brand Champion
Model 861
Weight 1.6 ounces
Rating 4.1 / 5.0
The NGK V-Power plugs are rated to operate over a much wider heat range than other options, making them more durable and giving them a leg up over the brand's standard version. They also feature metal plating with anti-corrosion and anti-seizing properties.
  • solid copper core
  • high alumina ceramics
  • good value option
Brand NGK
Model BKR5E-11
Weight 0.8 ounces
Rating 4.2 / 5.0
With a four year performance satisfaction guarantee, the Bosch HR7DPP30V can help stem the nagging doubt that sometimes comes with buying average replacement parts. The platinum-tipped plugs are supposed to last two times longer than standard copper ones.
  • tapered ground electrode
  • laser welded top
  • fine wire design
Brand Bosch
Model 6701
Weight 1.6 ounces
Rating 4.0 / 5.0
Combining the conductivity of copper and the durability of iridium, the Denso PK20TT is another platinum-reinforced option that is sure to improve the performance of any vehicle. A titanium-enhanced ground electrode helps it stand up under extreme stress.
  • twin tip technology
  • manufactured by pioneering brand
  • affordable price
Brand Denso
Model PK20TT
Weight 0.3 ounces
Rating 4.2 / 5.0
These NGK IFR5L-11 plugs offer the same level of expected reliability as basic iridium units, but they also happen to be laser welded, ensuring a stronger spark and, as a result, even better performance. Of course, they are a little more expensive.
  • feature long insulator nose
  • improve gas mileage and emissions
  • fit most makes and models
Brand NGK
Model IFR5L-11
Weight 1.6 ounces
Rating 4.9 / 5.0
For a seriously long-lasting option, the Autolite APP104 plug incorporates platinum on both the tip and center and side electrodes, making it virtually immune to the kind of carbon fouling and overheating damage that comes with high-end vehicle functioning.
  • nickel plated steel shell
  • guaranteed for five years
  • easy installation
Brand Autolite
Model APP104
Weight 6.4 ounces
Rating 4.7 / 5.0
Featuring the latest in spark plug technology, the Bosch Platinum Ir Fusion model combines the brand's patented fused iridium and platinum center electrode with four spaced ground arms to create an extremely powerful ignition connection.
  • require no adjustments
  • superior quality materials
  • self-cleaning design
Brand Bosch
Model 4501
Weight 0.8 ounces
Rating 4.8 / 5.0

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Last updated on April 20 2017 by Chase Brush

Chase is a freelance journalist with experience working in the areas of politics and public policy. Currently based in Brooklyn, NY, he is also a hopeless itinerant continually awaiting his next Great Escape.