Best Spark Plugs

The spark plugs of your engine are undoubtedly among its most crucial and smallest parts. Of course, you want the absolute best for your vehicle and that also means having the best spark plugs that would help your vehicle perform in the best possible condition. Think of them as a tiny lightning bolt. Tiny yet ultra-potent, the electricity they spark across a tiny gap produces the ignition needed for your vehicle to start.

With this in mind, we talked to experienced auto mechanics for advice. We also painstakingly sifted through trustworthy and authority vehicle forums and user reviews to give you a list of the best spark plugs available today.

Our Top Picks for The Best Spark Plugs

Best Overall Spark Plugs: NGK (5464) BKR5EIX-11 Iridium IX Spark Plug

NGK (5464) BKR5EIX-11 Iridium IX Spark Plug, Pack of 1
660 Reviews
NGK (5464) BKR5EIX-11 Iridium IX Spark Plug, Pack of 1
  • Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling
  • The 0.6mm laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect
  • Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage. Copper core aids in heat removal
  • Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high-performance engines
  • Trivalent metal plating has superior anti-corrosion and anti-seizing properties

Reasons to Buy

  • 0.6mm fine, laser-welded iridium tip
  • Copper core
  • Triple gasket seal
  • Longer insulator nose
  • Trivalent metal plating
  • Fits most kinds of vehicle models

The NGK BKR5EIX-11 Iridium IX delivers extreme ignitability, improved anti-fouling, and enhanced throttle response, perfect for performance enthusiasts. The NGK iridium plug’s super-fine laser welded iridium tip also ensures a consistent spark and extreme durability, while its tapered ground electrode reduces the effect of electrical quenching. Likewise, its trivalent metal plate offers excellent anti-seizing and anti-corrosion properties. 

NGK iridium spark plugs also come with longer than the average insulator nose to avoid fouling, tripe gasket sealing to get rid of gas leakage, and corrugated insulator ribs to prevent flashovers. Moreover, iridium alloy boasts of an immensely high melting point to give it the extreme resiliency to electrical wear and heat, suitable for today’s performance-driven vehicles.

Runner-Up for Best Spark Plugs: Denso (3297) SK20R11 Iridium Spark Plug

Denso (3297) SK20R11 Iridium Spark Plug, Pack of 1
308 Reviews
Denso (3297) SK20R11 Iridium Spark Plug, Pack of 1
  • SK20R11
  • Excellent acceleration and performance
  • Stable combustion during idling
  • Long life and high reliability
  • Features iridium with high melting point

Reasons to Buy

  • 0.7mm Iridium-tipped, fine wire center electrode
  • Extra-long life iridium plug
  • Platinum-tipped ground electrode
  • 1.1mm gap

The Denso SK20R11 boasts of an extra-long life due to its iridium components that are eight times stronger and six times harder than platinum. Due to the hardness and strength of iridium, electrode wear is also virtually non-existent with these plugs. Likewise, these characteristics, combined with an efficient platinum ground electrode, make the plug virtually impervious to common wear and tear even under severe racing or driving conditions.

In addition, these Denso spark plugs also offer astounding performance and acceleration, consistency, and long service life. They likewise feature a very high melting point and consistent combustion when idling. Also, don’t forget to pair these Denso iridium spark plugs with the best spark plug wires for maximum performance.

Best Spark Plugs for SUVs: ACDelco 41-110 Professional Iridium Spark Plug 

ACDelco 41-110 Professional Iridium Spark Plug (Pack of 4)
352 Reviews
ACDelco 41-110 Professional Iridium Spark Plug (Pack of 4)
  • Iridium offers better engine idle stability and smoother performance
  • Iridium allows for smaller, more efficient electrode designs for improved cold starting and quicker acceleration
  • Iridium fine-wire electrode helps improve ignition of the fuel and burns away carbon deposits on the tip of the plug as they form, to help improve fuel economy
  • One piece suppressor seal blocks radio frequencies that can affect vehicle electronics
  • Suppressor seal meters spark energy for longer electrode life and seals against combustion leakage

Reasons to Buy

  • Iridium tip
  • Virtually unchanged gap over its service life
  • 1-piece central suppressor seal
  • Offers up to 100,000 miles of lifespan in certain applications
  • Perfect for SUVs, older vehicles that require conventional plugs, and those that need platinum performance
  • 5 heat range from AC Delco spark plug heat range chart

As one of the best plugs commonly used in SUVs, older vehicle models that require conventional plugs, and vehicles that also need the performance of platinum plugs, the ACDelco 41-110 Professional Iridium Spark Plug can deliver as much as 100,000 miles of service life in select applications. Their fine-wire iridium electrodes also aid in enhancing fuel ignition and getting rid of carbon deposits on the plug’s tip as they’re forming to improve fuel efficiency.

Moreover, they have a 1-piece central suppressor seal capable of metering the plug’s energy for longer electrode life. This likewise protects against compression leakage. According to spark plug reviews, the gap in ACDelco 41-110 remains practically unaltered during its lifespan, ensuring fuel economy.

Best Spark Plugs for Mileage: NGK (6994) Laser Iridium Spark Plug

NGK (6994) Laser Iridium Spark Plug, Pack of 1
265 Reviews
NGK (6994) Laser Iridium Spark Plug, Pack of 1
  • Designed to operate over a much wider heat range than ordinary plugs
  • Resists carbon buildup and pre-ignition
  • High alumina ceramics for better heat transfer and electrical insulation
  • Solid copper core and nickel tipped electrode provide a longer plus life
  • Patented triple gasket sealing process eliminates the possibility of combustion gas leakage
  • Laser welded Iridium center electrode tip ensures high durability and greater spark
  • Platinum disc welded to backside of ground electrode provides long life
  • Longer insulator nose prevents fouling, Corrugated ribs on insulator prevents flashover, and the triple gasket seal eliminates combustion gas leakage
  • Faster starts and quicker acceleration
  • Better fuel economy and lower emissions, Trivalent Metal Plating for superior anti-corrosion and anti-seizing

Reasons to Buy

  • Laser-welded iridium center tip
  • High alumina ceramics
  • Nickel-tipped and solid copper core electrode
  • Triple gasket sealing

The NGL 6994 Laser Iridium features maximum performance over an extremely wider heat range than standard plugs. It also resists pre-ignition and carbon accumulation and offers high alumina ceramics for improved electrical insulation and heat transfer. Likewise, its nickel-tipped and solid copper core electrode can deliver a longer service life.

Furthermore, these NGK laser iridium plugs feature iridium center electrode tips that are laser-welded to deliver greater spark and resiliency. Their triple gasket seals also help in preventing leakage of combustion gas. Additionally, the longer insulator nose helps in preventing misfiring and fouling and the platinum disc welded to their back section offers longer service life.

Best Spark Plugs for European Cars: Bosch FR7KPP332 Double Platinum Spark Plug 

Bosch FR7KPP332 Double Platinum Spark Plug - Up to 3X Longer Life for Audi: 2009 A4 Quattro, 2009-11 A6 and BMW: 2004-10 X5, 2006-10 550i/650i, 2006-08 750i/750Li (Pack of 1)
2,824 Reviews
Bosch FR7KPP332 Double Platinum Spark Plug - Up to 3X Longer Life for Audi: 2009 A4 Quattro, 2009-11 A6 and BMW: 2004-10 X5, 2006-10 550i/650i, 2006-08 750i/750Li (Pack of 1)
  • Double Platinum firing pin and ground electrode inlay provide 3X longer service life compared to standard copper plugs
  • Fine wire design provides excellent ignitability and performance
  • 360° continuous laser welding to fuse the platinum firing pin for increased durability
  • 5 year performance satisfaction guarantee
  • Original equipment, pre-gapped replacement delivering optimum fit, form and function for a wide range of vehicles including, but not limited to, the following:
  • AUDI: 2009 A4 Quattro, 2009-11 A6; BMW: 2004-10 X5, 2006-10 550i, 2006-10 650i, 2006-08 750i, 2006-08 750Li

Reasons to Buy

  • Double platinum ground electrode inlay and firing pin
  • Fine wire profile
  • Pre-gapped, OEM
  • Perfect for most Audis and BMWs
  • 5-year guarantee

The Bosch FR7KPP332 Double Platinum Spark Plugs features high durability and extended performance. Their double platinum ground electrode and firing pin offer three times longer life than regular copper spark plugs. These properties are due to the use of the continuous 360-degree laser welding for fusing the iridium firing pin.

Furthermore, these Bosch spark plugs deliver exceptional performance and ignitability because of its super-fine wine profile. Their copper core also offers a wider heat range for reducing fouling and pre-ignition. They also come with nickel-plated shells to give them to prevent rust buildup and seizing.

Best Versatile Spark Plugs: NGK (4363) PZFR5F-11 Laser Platinum Spark Plug

NGK (4363) PZFR5F-11 Laser Platinum Spark Plug, Pack of 1
99 Reviews
NGK (4363) PZFR5F-11 Laser Platinum Spark Plug, Pack of 1
  • Designed to operate over a much wider heat range than ordinary plugs
  • Resists carbon buildup and pre-ignition
  • High alumina ceramics for better heat transfer and electrical insulation
  • Solid copper core and nickel tipped electrode provide a longer plus life
  • Patented triple gasket sealing process eliminates the possibility of combustion gas leakage
  • Laser Platinum spark plugs provide high ignitability and longer service life
  • Dual platinum surfaces ensure slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions
  • Laser welded Platinum center electrode tip creates faster starts and quicker acceleration while the platinum disc welded to backside of ground electrode provides long life
  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
  • Triple gasket seal eliminates combustion gas leakage

Reasons to Buy

  • Laser platinum plugs
  • Triple gasket seals
  • Dual-platinum surfaces
  • Nickel-tipped and solid copper tipped electrodes
  • High alumina ceramics
  • Works with a broad range of American, European, and also Asian-made vehicles

The NGK PZFR5F-11 Laser Platinum Spark Plug features high alumina ceramics to give you improved electrical insulation and heat transfer. Its laser platinum tip and nickel-tipped, solid copper core also deliver an extended service life and better ignitability, as well as resistance to pre-ignition and carbon buildup. It can likewise operate over greater heat ranges than regular plugs.

Moreover, its dual-platinum surfaces can help with premature wearing to offer lower carbon emissions, excellent anti-fouling, stable idle times, and better fuel economy. Its extended insulator nose also helps prevent misfire and fouling, while its triple gasket seal gets rid of potential combustion gas leaks

Best Spark Plugs for BMW and Mini Cooper: NGK BKR6EQUP Laser Platinum Spark Plug

NGK (3199) BKR6EQUP Laser Platinum Spark Plug, Pack of 1
203 Reviews
NGK (3199) BKR6EQUP Laser Platinum Spark Plug, Pack of 1
  • You can depend on NGK for quality and reliability
  • Constructed from durable material
  • Corrosion and abrasion resistant
  • Features corrugated ribs, ceramic insulator, copper core and triple interior seal
  • Reduces ignition system voltage requirements

Reasons to Buy

  • Laser platinum
  • Abrasion and corrosion resistant
  • Triple interior seal and copper core
  • Longer ceramic insulator and corrugated ribs
  • Suitable for many Mini Cooper and BMW models

Specifically designed to give superior throttle response and fuel ignition, the NGK BKR6EQUP Multi-ground Spark Plug is also made from laser-welded platinum to ensure premium durability. It likewise features multi-ground platinum electrodes that are less sensitive to high voltage requirements and enhance ignition.

It also has a pure alumina ceramic insulator and corrugated ribs for improved heat transfer and strength. Furthermore, according to top car forums and real user reviews, the NGK BKR6EQUP spark plug fits most Mini Cooper and BMW models perfectly.

Best Spark Plugs for Ford: Autolite APP104 Double Platinum Spark Plug

Autolite APP104 Double Platinum Spark Plug, Pack of 1
57 Reviews
Autolite APP104 Double Platinum Spark Plug, Pack of 1
  • Full platinum tips ensure virtually no gap erosion
  • Works to optimize engine performance for a longer life and improved fuel economy
  • Necked-down center electrode fires quicker and cleaner, with less voltage for easier starts and quicker acceleration
  • High nickel alloy side electrode maintains precise gap
  • Full copper core electrode provides better performance in all conditions

Reasons to Buy

  • Full platinum tips
  • Nickel side electrode
  • Full copper core, necked-down interior electrode
  • Perfect for a wide array of Ford Models
  • 5- year guarantee

The Autolite APP104 boasts of platinum-to-platinum firing electrodes that virtually get rid of gap erosion, offer greater durability, and minimize misfire. Its full copper interior electrode likewise delivers enhanced performance regardless of the conditions, while its nickel side electrode ensures a precise gap.

Furthermore, this premium plug offers the preferred tech most suitable for DIS engines. It likewise comes with a necked-down interior electrode for cleaner and faster fires, with less voltage, ideal for more rapid and easier starts. Additionally, it naturally functions to optimize performance to give you improved fuel efficiency and lengthier service life.

Best Spark Plugs for Motorcycles: NGK (6546) DCPR8EIX Iridium IX Spark Plug

NGK (6546) DCPR8EIX Iridium IX Spark Plug, Pack of 1
105 Reviews
NGK (6546) DCPR8EIX Iridium IX Spark Plug, Pack of 1
  • Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling
  • The 0.6mm laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect
  • Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage
  • Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high-performance engines
  • Trivalent metal plating has superior anti-corrosion and anti-seizing properties

Reasons to Buy

  • 0.6mm fine iridium laser-welded tip
  • Extended insulator nose
  • Immensely high melting point
  • Triple gasket seal
  • Corrugated insulator ribs
  • Trivalent metal plate
  • Perfect for all kinds of motorcycles including those from Harley Davidson, Ducati, and BMW

Specifically developed for those looking for high performance, the NGK DCPR8EIX Iridium IX boasts of superior ignitability, improved anti-fouling, and enhanced throttle response. Its iridium components offer an immensely high melting point, which gives it extreme durability against electrical wear and heat. Its trivalent metal plate likewise delivers enhanced protection against seizing and rusting.

Additionally, it has a fine laser-welded iridium tip for ensuing stable sparks and a tapered ground electrode from decreasing electrical quenching impact. Likewise, its lengthier insulator nose helps prevent fouling and its triple gasket seal minimizes leakage of combustion gas. Its corrugated insulator ribs also help prevent flashovers.

Also, if you’re looking for spark plugs for your Honda motorcycle, e3 spark plug reviews that the E3 Spark Plug E3.36 Powersports Spark Plug is your best bet.

Best Spark Plugs for Small Engines: Champion RJ19LM (868) Copper Plus Small Engine Replacement Spark Plug 

Champion Spark Plug Champion RJ19LM (868) Copper Plus Small Engine Replacement Spark Plug (Pack of 1)
798 Reviews
Champion Spark Plug Champion RJ19LM (868) Copper Plus Small Engine Replacement Spark Plug (Pack of 1)
  • Focused spark for maximum power
  • Exclusive Heat-Active alloy maintains stable operating temperature under all load conditions
  • Faster throttle response

Reasons to Buy

  • Heat-active copper alloy
  • Focused spark
  • Quicker throttle response
  • Ideal for many vehicles with small engines, particularly Briggs and Stratton lawnmowers

The Champion RJ19LM Copper Spark Plug delivers enhanced heat control and conductivity for greater overall wear. Aside from being compatible with many Briggs and Stratton lawnmowers, user reviews likewise state that it works well passenger cars, snowmobiles, Powersports, and other garden and lawn equipment. Reviews also recommend that if you’re considering the Champion RJ19HX spark plugs, get this one instead.

Different Kinds of Spark Plugs

No vehicle will ever start without a spark. And since the capabilities of the spark plug are inherently tied to engine performance, bad, weak, or damaged ones will naturally cause problems with cold starting as well as misfires when accelerating. Spark plugs come in different materials. Below is a quick guide of options out in the market.

Copper

  • Solid copper and nickel center electrode.
  • Requires more voltage to produce needed electricity.
  • Best for vehicles will small engines and those manufactured before the 80s.
  • Cheap, but won’t last as long.

Single Platinum

  • Platinum tip, sturdier than copper spark plugs.
  • Generates more heat.
  • Ideal for vehicles with electronic distribution ignition systems.
  • Eliminates the buildup of debris.
  • Can last up to 100,000 miles.

Double Platinum

  • Double platinum tips.
  • More costly than single platinum but also more durable.
  • Delivers a lengthier service life and greater performance than single platinum plugs.
  • Suitable for waste park system distributor ignition systems – this system makes the plug spark twice; in the cylinder of the exhaust stroke and in the cylinder of the compression stroke.

Iridium

  • Delivers significantly improved performance and combustion than all the other materials mentioned above.
  • Iridium vs. platinum spark plugs? More resilient and durable than platinum.
  • Features a tiny central electrode so it utilizes less voltage for generating electricity.
  • The costliest option but comes with the longest service life.
  • Take note that if you already have iridium plugs installed that require replacing, don’t downgrade to copper or platinum since you will definitely feel a reduction in your vehicle’s performance.

Which Best Spark Plugs Should You Get?

In almost all cases, especially older vehicles and high-performance vehicles, the best option would be iridium or platinum plugs since they’re compatible with most kinds of vehicles and will deliver improved performance, mileage, and fuel efficiency. It is, however, very vital to note that in some cases, it might be better to follow recommendations from the manufacturer, particularly if your vehicle has a more sophisticated or customized ignition system.

Also, keep in mind that NGK and Denso plugs are known for functioning very week with Asian vehicles and American vehicles, while Bosch is known for functioning best with European vehicles. When in doubt, you can scour online reviews or talk to your local mechanic about the best option for your specific vehicle.

Final Notes

To help make certain that your vehicle sustains maximum performance, power, mileage, and fuel efficiency, you need the best spark plugs for these crucial tasks. When buying, you need to make sure that you get the proper number of plugs your engine requires, as most need one plug for each cylinder, while some need two. You also have to use the same exact kind for your engine—never mix and match. Lastly, always change your spark plugs at the recommended intervals to ensure maximum performance and avoid complications later on.

Did you go with Bosch, Denso, or NGK? Are they performing well? Share your thoughts on it below!

In the market for new car speakers? Read our review on the Best Car Speakers here. For something you can bring with you anywhere, you might want to check out our recommendations on the Best Bluetooth Earbuds here.

Additional Resources:

Advance Auto Parts

https://shop.advanceautoparts.com/r/advice/car-maintenance/the-differences-between-spark-plugs

Family Handyman

https://www.familyhandyman.com/automotive/car-maintenance/how-to-buy-spark-plugs/

Share

Influx Media is reader-supported. As an Amazon Associate we earn from qualifying purchases at no extra cost to you.

Leave a Comment