Ten Best Spark Plugs For 2019 – Reviews of All The Best Brands in Spark Plugs

Spark plugs are small, palm-sized devices that are primarily used in cars and other motor vehicles. When you turn on a car, the spark plug is what creates the spark that ignites the compressed air in the engine. In layman’s terms, it is what starts the engine of any vehicle.If your engine is showing signs of bad spark plugs, take a look at them. On old and worn down spark plugs, the tips become black, charred, slightly rusted, and sometimes dented and bent.

 

What kind of spark plugs should you get?

There are three types of spark plugs: copper, platinum, and iridium.

Copper (cheapest quality): get up to 20,000 miles (Used mostly for older cars)
Platinum: get up to 60,000 miles
Iridium: get over 100,000 miles

However, make sure your car is compatible with whichever spark plug you choose. Getting the wrong size can be a factor as well. Below is a list of ten spark plugs, popular and not, that are newer and older models but just as valued among consumers.

 

What are hot and cold spark plugs?

Hot spark plugs ones that slowly transfers heat from the firing tip into the engine, causing the firing tip to stay hot. Cold spark plugs transfer the heat quickly which keeps the firing tip cooler.

 

What could happen if you do not change your spark plugs?

The engine could:
Have a rough idle
Misfire
Surge or hesitate
Consume more fuel than usual
Have trouble accelerating
Have trouble starting

 

Below I have listed the best spark plugs on the market today and have given you a brief summary of each product.

 

5464 BKR5EIX-11 Iridium IX Spark Plug from NGK

Having anti-seizing and anti-corrosion from the metal plating is what helps give these plugs such a long life, both on the shelf and in the car. It is also one of the most reliable and popular options out there, especially for being a 10-year-old model.

If you need a single plug, however, you will be paying more than you would if you buy a 4 pack. If that does not bother you, then this is a great choice.

Specs
Weight: 1.6 ounces
Folding: No
Amount: 1 or 4 in a pack
Material: Iridium alloy

PROS
Durable to heat and electric wear
Long lasting
Laser welded

CONS
More expensive

 

 

6619 Iridium Spark Plugs LFR6AIX-11 from NGK

Nearly as old of a model as the previous plugs, these plugs are another example that NGK has some reliable older models. These plugs not only keep the engine idling smoothly, but they also can slightly improve the gas mileage, especially after replacing old or damaged spark plugs.

The few negatives that they have are that they are a little less popular than some of the others on this list. Also, they are a little on the pricey side, but not by much. Many of the newer cars, mostly 2017’s and 2018’s, are not compatible with them.

Specs
Weight: 11.5 ounces
Folding: No
Amount: 6 in a pack
Material: Iridium alloy

PROS
Smooth Idle
Long Life
Pack has 6 instead of 1 or 4

CONS
More expensive

 

 

41-110 Professional Iridium Spark Plug from ACDelco

The main problem most spark plugs have is the carbon deposits that build-up on them. With the fine-wire electrodes that these spark plugs have, the carbon deposits are burned off before they can permanently remain on.

The main concern is that this particular model is no longer made by the manufacturer, despite being a classic and popular choice. Like with the last product, buying a single plug versus the four plug pack is slightly more expensive.

Specs
Weight: 2.08 ounces
Folding: n/a
Amount: 1 or 4 in a pack
Material: Iridium alloy
Other: Discontinued by manufacturer

PROS
Better than most factory plugs
Reliable Warranty

CONS
Single plug

 

 

4504 PK20TT Platinum TT Spark Plug from Denso

Many people are surprised by the fact that these spark plugs are so cheap compared to the others. When looking at the price and the purified alumina powder insulators that they have that provides extra strength and thermal conductivity, it is clear why this is one of the more popular products.

While they are built to last long, they are not as long lasting as others on this list. In that sense, the price does slightly reflect the quality. It does not help that you can only buy this model in a single pack.

Specs
Weight: 0.32 ounces
Folding: No
Amount: 1 in a pack
Material: Platinum

PROS
Generally Cheaper
Decent life span

CONS
Cheaper in quality
Single plug

 

 

4417 Platinum+4 FGR7DQP spark plug from Bosch

These are a very unique set of plugs, especially when comparing them to the rest. What sets them apart is that there are four yttrium-enhanced ground electrodes, and almost every other spark plug has only 1 or 2. These extra electrodes give less gap wear and oxidation to extend the lifespan of the plug.

Being a relatively new and unique model, not many people have used these plugs. When comparing their price to others, they are significantly more expensive. There also may be more limitations with which cars are compatible with these plugs, considering their design.

Specs
Weight: 7.2 ounces
Folding: No
Amount: 6 in a pack
Material: Platinum

PROS
Pack of 6 instead of 1 or 4
4 ground electrodes
Easy installation

CONS
Expensive
Less popular

 

 

(5304) IK20 Iridium Power Spark Plug from Denso

Probably one of the most standard designs used, this spark plug with its U-shaped groove and taper cut ground electrode is pretty average as far as the quality is concerned. The price is just as average as well as its popularity.

All in all, it is a good replacement plug if you do not want to pay extra for the higher quality plugs. The only negative aspect is that they are only sold in single packs.

Specs
Weight: 5.6 ounces
Folding: No
Amount: 1 in a pack
Material: Iridium alloy
Other: Requires Lithium Metal batteries

PROS
Laser Welded
Reliable

CONS
Single plug

 

 

6714 Platinum Spark Plug from Bosch

A less popular and older model, these plugs are generally cheaper in price and decent in quality. Made with laser welding, the platinum firing pin, and the yttrium enhanced ground electrode is designed to provide twice as long of a lifespan. What sets this model apart from the others is that it has a 4-year performance satisfaction guarantee.

Specs
Weight: 6.9 ounces
Folding: n/a
Amount: 1 or 4 in a pack
Material: Platinum
Other: Cover Included

PROS
Laser welded
4 year guarantee
Cheap (price)

CONS
Less popular
Single plug

 

 

(6637) BPR6EIX Iridium IX Spark Plug from NGK

If you need a copper spark plug, this one is an ideal choice. Resistant to carbon build-up and pre-ignition, the plug also has a triple gasket sealing that helps to prevent a combustion gas leak. The core is made from solid copper and the electrode is nickel tipped to provide a longer lifespan.

Specs
Weight: 1.76 ounces
Folding: No
Amount: 1 in a pack
Material: Iridium alloy, Copper, Nickle-tipped
Other: For off-road-motorcycles and/or all-terrain-vehicles

PROS
Good performance
Laser welded

CONS
Copper core
Nickle tipped electrode
Very expensive (compared to all other prices)

 

 

6994 IZFR6K-11 Laser Iridium Spark Plugs from NGK

If you could not tell by now, many of the spark plugs on this list are made by NGK and rightfully so. They are reliable, well-made, and classic, and these plugs are no different. This laser-made, Iridium spark plugs are a newer model compared to the others. They are a little less popular but just as valued, both in price and quality.

Specs
Weight: 10.6 ounces
Folding: No
Amount: 6 in a pack
Material: Iridium alloy

PROS
Laser welded
6 in a pack

CONS
More expensive than most
Less popular

 

 

SP-509 SPARK PLUG from Motorcraft

If you need some spark plugs and want extras, then these are a good choice. Having double the amount of plugs compared to most, these 8 Iridium spark plugs are great for replacing other factory ones.

The downside is that they cost a little more than other plugs on the list. Also, the plugs have only been available for over a year and are not as popular as the other choices.

Specs
Weight: 12 ounces
Folding: No
Amount: 8 in a pack
Material: Platinum
Other: Interchange Part Number: HJFS24FP

PROS
8 in a pack
Runs better than factory plugs

CONS
Slightly more expensive

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