Best Spark Plugs for Your Car – Review and Buying Guide of 2019

The primary function for an engine is to provide the required power for a vehicle to move. The power comes as a result of compressing the fuel upon ignition of the vehicle. To cause ignition, the engine has got small but yet a very significant component: the spark plug.

For most scheduled routine auto maintenance, some people often forget changing the spark plugs which is as important as checking the tire pressure or changing the oil. They should be up for the task all times in all the weather conditions.

It’s surprising though that given how important this component is, still, they are very affordable. However, you won’t have to purchase anything you come across on the market. There is a variety of them and choosing the best spark plug can be challenging, but with this review, your selection process will be a walk in the park.

Top-Rated Spark Plugs on the Market

  1. NGK BKR5EIX Iridium 1X Spark Plug
  2. Autolite Double Platinum Spark Plug
  3. Denso (4504) PK20TT Platinum TT Spark Plug
  4. ACDelco 41-993 Professional Iridium Spark Plug
  5. Bosch 4417 Platinum+4 FGR7DQP Spark Plug
  6. Motorcraft SP- 515 Spark Plug
  7. Champion Copper Plus Small Engine Spark Plug
  8. NGK Platinum Spark Plug
  9. Denso (5304) IK20 Iridium Power Spark Plug
  10. NGK 7090 BKR5EGP G-Power

NGK BKR5EIX Iridium 1X Spark Plug

The NGK BKR5EIX Iridium 1X Spark Plug is laser welded and is exceptionally durable hence a must-have for the high-performance engines. Its main features are durability and for performance engines.

It provides an excellent amount of power for the engine through optimum use of fuel/air mixture. Therefore, if you’re looking to increase horsepower, it should be the ideal choice.

It guarantees little or no misfiring or malfunctioning because it comes with a slightly longer insulator nose when compared with the other spark plugs.

It also uses iridium which is the best material when talking about performance. The corrugated ribs that are present on the insulator prevent flashovers.

It also features a triple gasket seal which helps to eliminate the combustion gas leakage. It also has a trivalent metal plating which offers an excellent standard for anti-corrosion as well as anti-seizing properties.


  • 6mm electrode
  • Designed especially for high performance
  • Iridium construction
  • A metal plating that resists seizing
  • Ribbed insulator preventing from flashover


  • Expensive
  • Delicate iridium that can fracture

Autolite Double Platinum Spark Plug

From its name, this spark plug provides platinum-platinum firing. It’s incredibly durable as it utilizes platinum tips as well as side electrodes and platinum center. The Autolite Double Platinum Spark Plug suits cars that perform “normal” work like commuting to work or driving to the mall.

It provides a virtually gap erosion that is inexistent making it great considering how often it can occur. It also works to optimize your engine performance as it aids fuel consumption with time.

The necked-down electrode is made in such a way that it helps to fire quicker as well as a cleaner with little voltage as compared to a regular plug.

Also, it features a full copper core center which almost guarantees excellent performance in all weather conditions.


  • Improves fuel economy
  • Central electrode fires cleanly and quickly
  • High resistance to corrosion
  • Platinum-platinum firing which enhances durability and performance


  • Manually gapped

Denso (4504) PK20TT Platinum TT Spark Plug

The dual tip creation makes this unit an excellent option to buy as it offers a twofold enchantment; an 11mm focus terminal of platinum and an 11mm titanium anode that expands the mileage. With these two folds, the auto capacity of the spark plugs is preferable and becomes speedier again.

The cleaned alumina powder casing gives it a real definite improvement as well as the outcome control. This powder is an insulator material, and it increases the thermal conductivity as well as boosting for a long lifespan.

Its construction makes it able to withstand all the extreme stress it can be exposed to, and it offers an extremely exceptional dielectric strength.

Overall, the Denso (4504) PK20TT Platinum TT Spark Plug offers a highly improved fuel economy, faster start times and a better acceleration.


  • Platinum twin tips
  • Advanced materials
  • Alumina powder insulator
  • Inexpensive
  • Long life
  • Excellent thermal conductivity
  • Faster and cleaner acceleration


  • Can’t use with Volvo
  • Single plug

ACDelco 41-993 Professional Iridium Spark Plug

The ACDelco Professional Iridium Spark Plug tends to be a bit pricey because it poses some delicate features as well as added benefits. This spark plug is meant to last long, and it’s one of the best for performance engines and gas mileage.

It was mainly designed in a way for general motors, and it has proven to be a perfect replacement for the top performing vehicles of today.

It assures you of an engine idle stability hence making it standout thanks to its small yet efficient electrode and general design.

It delivers a reliable cold-starting as well as faster acceleration without compromising basic decency in any way. It features a 1-piece suppressor that blocks the radio frequencies that may inhibit the vehicle’s electronics.


  • Incredible performance
  • Wear resistant
  • Outstanding lifespan
  • Better combustion
  • Affordable
  • Faster acceleration
  • Smoother running engine


  • Not ideal for the new model vehicles
  • Expensive

Bosch 4417 Platinum Spark Plug

When it comes to the fuel economy, nothing gives better like the Bosch platinum spark plug. Literally, it offers the best combustion due to the fact that the ground electrodes provide easy access to the fuel/air mixture making the process to run smoother.

Besides, it has 4 ground electrodes that are pronged which ensure the maximum amount of fuel/air mixture reached for combustion.

It features a working heat-fused center electrode that integrates the pure platinum ensuring that there is an optimal engine performance, smoother and quicker acceleration as well as peak fuel efficiency.

It also has a design that is straightforward to use merely plug and play stuff without adjustments once it’s installed.


  • Easy to install
  • Absorb higher temperature
  • Long life
  • Low maintenance design
  • Power spark for the engine to run well
  • Great efficiency and power


  • Relatively expensive
  • Single plug

Motorcraft SP- 515 Spark Plug

The Motorcraft SP- 515 Spark Plug is mainly meant to deal with the high melting points. It is a big name when talking about replacement auto products. These products work well with Ord Motors but still can be used and will work well with Dodge, GMC, and other vehicles.

Once they are installed, they make your vehicle to run smoothly with only little adjustment while on the process. It fits nicely and will thread in easily.

The Motorcraft offers coordinate substitutions for the industrial facility spark plugs that you may need from another producer. Besides, they almost require no change while you hit the road.

The platinum’s high melting points only provide a higher resistance to erosion which results in miles interval of 60,000-100,000 between the spark plugs change at the same time maintaining maximum engine performance.


  • Very simple to install
  • Affordable
  • Makes the vehicle to run smoothly
  • Little adjustment required
  • Fits most automobiles


  • No anti-seize

Champion Copper Plus Small Engine Spark Plug

The Champion Copper Plus Small Engine Spark Plug is mostly known for the reliable performance that it provides. It has a copper center cathode which gives the unit an expanded conductivity as well as heat control.

Generally, they offer the best, tried and trust-able function. Also, it is compatible with almost all vehicles and has a longer lifespan.

It guarantees regularity regarding performance and also it controls better via its trick. It also incorporates a very competitive warranty.

The main focus of this product is your car’s performance and in addition, it can as well convey prevalent ignitability plus an enhanced throttle response.


  • 100 years and more of production
  • Copper center cathode
  • Compatible with most vehicles
  • Inbuilt corrosion resistance
  • Sturdy and dependable design


  • Not really appropriate for trucks and cars

NGK Platinum Spark Plug

The NGK products are generally great for almost all vehicles. Therefore, the NGK Platinum Spark Plug is suited mostly for small cars such as the Volkswagen and the Audi. The most important thing is that they offer high ignition ability for an extended period.

The reason is as a result of slow decomposition of the platinum that makes the metal to last for an extended period.

Also, the increased durability translates to excellent gas mileage and hence making the NGK platinum spark plug one of the best.

Besides, it delivers quality for all types of vehicles. Furthermore, the NGK platinum spark plugs have a reasonable price tag hence affordable.

They are also made in such a way that they will not burn all the resources available making a unique in their way.


  • Long life
  • Lowers emissions
  • Provides a smoother idling
  • Highly efficient
  • A reasonable price tag


  • Doesn’t improve the performance as it’s expected

Denso (5304) IK20 Iridium Power Spark Plug

The Denso (5304) IK20 Iridium Power Spark Plug is another great product that speaks of high performance. It has a tapered cut U-Groove ground electrode that increases the ignitability as well as decreasing quenching.

It’s also 100% pre-fired which means you’re assured of the highest quality that you can think of. Additionally, it features five rib insulators that effectively prevent flashover.

The laser-welded wire center electrode reduces significantly required voltage as well as improving the firing performance.

The machine rolled threads that it features prevent seizing or the cross threading during installation as well as removal.

Another great feature is the purified alumina power insulator which provides exceptional strength and also thermal conductivity.


  • Compatible with several vehicles
  • Affordable
  • High performance
  • Prevents flashover
  • Exceptional strength and excellent thermal conductivity


  • Single plug

NGK 7090 BKR5EGP G-Power

The NGK 7090 BKR5EGP G-Power offers superior performance with improved fuel efficiency, quicker starts, and lower emissions.

It features a laser welded fine wire (platinum) tip which reduces the required voltage. The platinum alloy ground as well as a center electrode for a greater spark at the same time ensuring a precise gap during the plug’s life.

It has an innovative design that provides a high-performance of the iridium-construction models all at an affordable price.

There are particular configurations on the insulator noses which helps to improve the throttle response as well as preventing fouling with the corrugated ribs that prevent flashover.


  • 4 plug packs
  • Platinum tips
  • 6m electrode tip
  • Nickel alloy
  • Anti-corrosion as well as anti-seizing properties.


  • The platinum is on the tip only

Spark Plugs – The Buyer’s Guide

When your vehicle is your joy and pride, you’ll want only the best for it which means having the best spark plug while turning it on. There’s no denying that there is a variety of spark plugs on the market and you can’t purchase any of them and claim to best. Therefore, before you are buying, make sure you consider the following:

Model and Make of the Car

Just like cars, spark plugs are as well developed in various countries and therefore they come with multiple specifications of the model and make for which only they can operate. It won’t be ideal having a wrong spark plug model into your car. Be sure to get the right make and model. The information includes the year of manufacture of your car.

Engine Type and Number of Cylinders

Before going into a store to buy a spark plug, be sure you have enough knowledge about the type of engine of your car and the number of cylinders available. With this information, you’ll only then be aware and able to determine whether a particular spark plug will be able to provide the spark that is sufficient to ignite the fuel/air mixture in the engine.

The Engine Displacement

Engine displacement is merely that amount of room present in every cylinder whenever the piston is at the lowest point. This information is crucial to have as it helps to determine the length of the spark plug that you require to ignite the fuel in the engine.

Vehicle Use

The use of your car will also determine the type of spark plug you can buy. For instance, a car for only taking you to and from work will require different spark plugs, unlike one you use for some heavy duty work over the weekend.

Inferior Spark Plugs

Some people like taking corners all to save some cash. Spark plugs don’t allow these shortcuts. It is not advisable to replace the original spark plugs of your vehicle with others which are not up to the standard similar to the original. The best replacement you can make is replacing the spark plug with similar quality or even better.

Our Recommendation

An engine is notably the fatal part of a vehicle and to maintain your car means that you have to take good care of the engine. The spark plugs in this article will all help your engine required to move your car. However, we highly recommend the NGK BKR5EIX Iridium 1X Spark Plug because it’s purposefully designed for high performance and it’s compatible with most vehicles. In case, you need a spark plug that is exceptionally durable and one to improve fuel economy, the Autolite Double Platinum Spark Plug is the best bet.


Never should you underestimate the problems of your engine. Some small, as well as cheap parts such as spark plugs, can always make a significant difference, and the difference literally pays off quickly. In cases of upgrading your spark plug, it will be nice to consider titanium, platinum or iridium plug for their longevity and best performance. As long these spark plugs meet all the requirements of your vehicle, they absolutely can’t go wrong.