The Best Spark Plugs

Best Spark Plugs: Reviews, Top Picks, Buying Guide & FAQ

πŸ₯‡ Rank #1
NGK
94 %
βœ”οΈ Highly Recommended!
πŸ₯ˆ Rank #2
Denso
92 %
βœ”οΈ Highly Recommended!
πŸ₯‰ Rank #3
Denso
92 %
βœ”οΈ Highly Recommended!
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Spark Plugs: Editor's Overview

Last Updated on Saturday, October 24th, 2020.

Without a spark plug, most cars and engines won't startup. Why? Spark plugs emit an electrical part over a gap, which, in turn, leads to combustion and your vehicle to start as quickly as you turn the ignition. The wrong spark plugs will stall your car: hence, we've pieced together a concise guide on the best spark plugs from different brands.

How we Reviewed and Ranked Spark Plugs

To create our buying guide for the best spark plugs of Oct 2020, we analyzed 3,974 user reviews across 10 products with an average user rating of 4.4 stars. Our scoring algorithms remove fake reviews, consider expert reviews on other websites and monitor search engine interest to determine our confidence in your satisfaction with your purchase.
10
Products Reviewed
3,974
Reviews Analyzed
4.4 ⭐
Average User Rating
$26.04
Average Price
88%
Average ProductAdvisor Score
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The Best Spark Plugs of Oct 2020


Rank #1


βœ”οΈ We Highly Recommend This Product!
62
Reviews Analyzed
4.7 ⭐
Average User Rating
$17.24
Latest Price
94%
Our Score

Here's yet another NGK 3951 TR55 Spark Plug. The plug comes in a pack consisting of 8 spark plugs that feature a nickel electrode tip and copper core. The plugs are enriched with corrosion-resistant plating and are pre-gapped 0.060-inches.

Key Features

  • The plugs come pre-gapped 0.060-inch.
  • It comes as a pack of eight plugs.
  • They're made of copper and nickel.
  • Corrosion-resistant plating for durability.
Rank #2


βœ”οΈ We Highly Recommend This Product!
174
Reviews Analyzed
4.6 ⭐
Average User Rating
$19.31
Latest Price
92%
Our Score

The Denso PK20TT 4504 Platinum TT Spark Plugs doesn’t fall short of expectations. It dons the twin tip design and comes in a pack of six. You also get a purified alumina powder insulator to improve temperature resistance.

Key Features

  • Dual twin-tip design for improved performance.
  • Platinum-titanium combination reduces tip erosion.
  • Contains purified alumina powder for temperature resistance.
  • It comes in a pack of six.
Rank #3


βœ”οΈ We Highly Recommend This Product!
160
Reviews Analyzed
4.6 ⭐
Average User Rating
$17.74
Latest Price
92%
Our Score

The DENSO 4503 Platinum TT Spark Plugs PK16TT packs a bunch of features in a modest price tag. It has a platinum twin tip design, and its design allows it to have a lifespan of up to 60,000 miles.

Key Features

  • The plugs come in a pack of six.
  • All the plugs are pre-gapped.
  • They have platinum tips and are compatible with a lot of cars.
  • The plugs have a high lifespan.
Rank #4


βœ”οΈ We Highly Recommend This Product!
366
Reviews Analyzed
4.6 ⭐
Average User Rating
$12.49
Latest Price
92%
Our Score

The NGK 7090 BKR5EGP G-Power Spark Plug is innovatively designed to help you achieve fuel efficiency, decreased emissions, and faster starts. It sports a 0.6 mm laser welded Platinum tip and an insulator nose with decent throttle response.

Key Features

  • Metal plating to impede corrosion.
  • The plugs are already pre-gapped.
  • It has a 0.6mm platinum tip that is laser welded.
  • It comes in a pack of four.
Rank #5


βœ”οΈ We Highly Recommend This Product!
101
Reviews Analyzed
4.5 ⭐
Average User Rating
$79.50
Latest Price
90%
Our Score

The ACDelco 41962 Spark Plugs come in a pack of 8 and are as efficient as most of the market's plugs. They have thick silicone jackets, a double-platinum point pad, and they're compatible with many vehicles.

Key Features

  • They come in a pack of eight.
  • Eight plug wires are included for you.
  • These plugs are pre-gapped at 0.043-inch.
  • Compatible with different vehicle models.
Rank #6


βœ”οΈ We Highly Recommend This Product!
2,684
Reviews Analyzed
4.5 ⭐
Average User Rating
$2.68
Latest Price
90%
Our Score

Pictured here is the Bosch 9607 Double Iridium Spark Plug that portrays the superlative performance of iridium spark plug technology. It features a double iridium ground electrode and firing pin and is pre-gapped right out of the box.

Key Features

  • The plug has dual iridium firing pins.
  • It has a 7-year performance rating.
  • It’s pre-gapped out of the box.
  • It’s compatible with different cars.
Rank #7


βœ”οΈ We Recommend This Product!
94
Reviews Analyzed
4.3 ⭐
Average User Rating
$22.09
Latest Price
86%
Our Score

The NGK 3186 TR5GP G-Power Platinum Spark Plugs are worth having in your car. It sports a platinum-tipped center electrode that promotes faster starts and perhaps, increased fuel efficiency.

Key Features

  • It has a triple gasket seal.
  • An insulator with corrugated ribs.
  • Platinum-tipped center electrodes.
  • It comes in a pack of 8.
Rank #8


βœ”οΈ We Recommend This Product!
107
Reviews Analyzed
4.2 ⭐
Average User Rating
$37.97
Latest Price
84%
Our Score

The NGK 4469 LFR5AIX-11 Iridium IX Spark Plugs are made explicitly to suit high-performance engines. They feature iridium construction and an ultra-thin electrode of 0.6mm, as well as the trivalent metal plating.

Key Features

  • It’s compatible with different vehicles.
  • The plug comes in a pack of six.
  • These plugs have a 0.6mm electrode.
  • Trivalent metal plating and are pre-gapped.
Rank #9


βœ”οΈ We Recommend This Product!
45
Reviews Analyzed
4.2 ⭐
Average User Rating
$38.75
Latest Price
84%
Our Score

If you're looking for iridium spark plugs, these NGK 6509 LTR6IX-11 Iridium Spark Plugs are for you. They feature a fine wire center electrode that promises a consistent and accurate spark.

Key Features

  • Works with a variety of cars.
  • It has a trivalent metal plating.
  • It comes in a pack of six.
  • The plugs come pre-gapped.
Rank #10


βœ”οΈ We Recommend This Product!
181
Reviews Analyzed
4.0 ⭐
Average User Rating
$12.67
Latest Price
80%
Our Score

The NGK 7092 BKR6EGP G-Power Spark Plug is an excellent choice with quite a handful of features. The plugs have an impressively thin 0.6mm tip, laser-welded platinum in the center and ground electrode, and a specially configured long insulator nose.

Key Features

  • It comes in a pack of four with a 0.6mm tip.
  • The four plugs come pre-gapped.
  • It features longer insulator noses.
  • A laser welded platinum tip.

Spark Plugs: Buying Guide

These are the main factors to examine before purchasing your spark plugs.

πŸš™ Vehicle Type

Check the manufacturer's information to be sure that the plug you want to buy is compatible with your vehicle. Also, take note of the number of plugs required by your vehicle.

πŸ“ Pre-gapped or Not

Do you want a pre-gapped spark plug? What's the recommended gap for your vehicle? These two questions will help point you in the right direction. Most of the plugs on the market come pre-gapped at various levels and so you may need to adjust the gap.

6️⃣ 6️⃣ How many plugs do you want?

Different vehicles have different plug number requirements and you must use the same plug across the board. Take note of this when you're shopping for a new plug. They often come in packs of six and eight.

πŸ’  The Type of Plug

Spark plugs are made using a variety of materials including iridium, platinum, nickel, and copper. Iridium spark plugs are the best because of their construction quality, reliability, longevity, and performance-related records. Platinum plugs are also a great option, but they're nowhere near the iridium plugs which are the priciest of the lot.

πŸ”© Nut Size & Heat Ranges

Do you want hot or cold spark plugs based on their insulation abilities? Your environment plays an important role in making a pick. Also, consider the thread and nut sizes on the spark plug you want to buy as there are different sizes.

Frequently Asked Questions


Iridium spark plugs are known to offer better performance more than their platinum and nickel counterparts. But they tend to be pricier than these models. If you're looking for an excellent plug for your performance-oriented vehicle, then you should check out iridium spark plugs.

Iridium spark plugs are known to offer better performance but this doesn't mean it can increase the horsepower rating of your engine. Platinum spark plugs also offer impressive performance.

Yes, you can buy pre-gapped spark plugs. You can always adjust the gap to suit your vehicle's gap needs.

Yes and no. A relatively known brand may offer a spark plug that is not up to par with the standard industry plugs. On the other hand, an unpopular brand may have a spark plug that is far better. If your vehicle manufacturer recommends a particular brand of plugs, kindly stick with it.

The average price of a spark plug is $26.04. They range in price from $2.68 to $79.50

The best spark plug for the money is the NGK 3951 TR55 8 Pack Spark Plugs. It costs $17.24 on Amazon.com

The cheapest spark plug is the Bosch 9607 Double Iridium Spark Plug. It costs $2.68 on Amazon.com

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Compare Spark Plugs

Our editors selected the following Spark Plugs for consideration in our list.
Brand Product Score Price Reviews Rating Weight Dimensions
NGK NGK 3951 TR55 8 Pack Spark Plugs 94% $17.24 62 4.7⭐ 0.00 lbs 41.52 W x 96.48 L x 10.92 H
Denso DENSO 4504 Platinum TT Spark Plugs 92% $19.31 174 4.6⭐ 0.00 lbs 0 W x 0 L x 0 H
Denso Denso 4503 PLATINUM T T Spark Plugs 92% $17.74 160 4.6⭐ 0.09 lbs 0 W x 0 L x 0 H
NGK NGK 7090 BKR5EGP G-Power Spark Plug 92% $12.49 366 4.6⭐ 0.18 lbs 1.1 W x 3.4 L x 0.9 H
AD Auto Parts New WGM48 ACDelco Spark Plugs 90% $79.50 101 4.5⭐ 0.00 lbs 0 W x 0 L x 0 H
Bosch Automotive Bosch 9607 Double Iridium Spark Plug 90% $2.68 2,684 4.5⭐ 0.10 lbs 0 W x 0 L x 0 H
NGK NGK 3186 G-Power Platinum Spark Plugs 86% $22.09 94 4.3⭐ 0.30 lbs 0 W x 0 L x 0 H
NGK NGK LFR5AIX-11 Iridium IX Spark Plugs 84% $37.97 107 4.2⭐ 0.00 lbs 0 W x 0 L x 0 H
NGK NGK 6509 Iridium Spark Plug LTR6IX-11 84% $38.75 45 4.2⭐ 0.65 lbs 0 W x 0 L x 0 H
NGK NGK 7092 BKR6EGP G-Power Spark Plug 80% $12.67 181 4.0⭐ 0.10 lbs 41.52 W x 48.24 L x 10.92 H
Brand Product Score Price Reviews Rating Weight Dimensions

Best Spark Plug Brands

The following brands make the best Spark Plugs in the market.

Sources

Thank you to these resources for helping us compile this page
https://www.thedrive.com/reviews/27526/best-spark-plugs
The best spark plugs on the market boast an iridium construction. Iridium spark plugs give you even ...
https://motorday.com/best-spark-plugs/
The NGK 6619 Iridium Spark Plugs are our pick for the best spark plugs as they are one of the most p...
https://autoquarterly.com/best-spark-plugs/
Different Types of Spark Plugs; Top 10 Best Spark Plugs 2020. 1. NGK 6619 Iridium Spark Plugs LFR6AI...
https://www.carbibles.com/best-spark-plugs-reviewed/
Best Rated Spark Plugs in 2020: 1 NGK 6619 Iridium Spark Plugs LFR6AIX 2 DENSO 4504 PK20TT Platinum ...
https://www.carsfellow.com/best-spark-plugs/
The best spark plug is the NKG iridium, but it is costly, which makes it a problem for some buyers b...
https://www.autoguide.com/buyers-guide-the-7-best-spark-plugs
Combining advanced technologies, improved efficiency and performance, and the reputation of one of t...
https://www.mippin.com/best-spark-plugs/
They are perhaps among the best standard spark plugs in the market currently. The NGK CR9EK Standard...
https://consumercure.com/best-spark-plugs/
These are the best spark plugs for 5.7 l Hemi as they have trivalent metal plating, as opposed to se...
https://www.bestcovery.com/best-spark-plug
Best Spark Plugs Bosch Platinum +4 Spark Plug For the vast majority of drivers on the road today, th...
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