Best Spark Plugs 2019 : Review and Buying Guide

Last Updated on December 17, 2021

Best Spark Plugs for car 2019 : There are times when you would realize that your car is running rough, or the engine is backfiring or stalling. These indicate that your spark plug is due for replacement. But the question is now which is the best Spark Plugs for your car?  When you check online or go for the nearby store you got confused with lot of option.

It is better to check our best spark plugs buying guide which will save your time and money both. Before moving ahead to the best spark plugs for your car we should not miss the compression table of best spark plugs of 2019.

Best Spark Plugs Review 2019

1. Denso (4504) Double Platinum Spark Plug : Cost Effective Spark plug

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Denso Double Platinum Spark Plug is so responsive and with the twin tip technology it offers double magic. One is 11 mm platinum center electrode while the other is 11 mm titanium electrode which increases the fuel economy. With the double spark plugs the car functions better and start faster than the one. It has purified alumina powder insulator that gives major positive changes and the result for the better power.

It is good for all kind of vehicles and improves the longevity of the engine by giving not stress to it. It gives consistence in the performance and controls better with its peculiarity.​

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2. BOSCH 4501FGR8DQI Platinum IR Fusion Spark Plug

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Bosch is a well known brand and it manufactures plenty of items for the vehicles. It has potential to offers best to your car and its spark plugs have limitless features to make your car more flexible on road. This will give the faster and better engine to perform for your vehicles. Its performance is better and fast. It can control the fuel consumption as there will be less stress on the engine. It has fused iridium and Platinum electrode and there is gap that provides air for getting good spark that proves that there will be less exertion or less stress.

Best Bosch FGR8DQI Platinum IR Fusion Spark Plugs

The unexceptional performance with the 4 yttrium that will speed up electrodes is incredible. It is good in self cleaning so you will be tension free wherever you are taking your car. The pricing is absolutely reasonable and your car can go extra miles than general. The car runs smoother even you have driven your car roughly. Fuel economy is better.​

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3. AC Delco 41-993 Professional Iridium Spark Plug : Best Iridium Spark Plug

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This brand of spark plugs offer best performance as comes with various features. The Iridium offers better engine stability and unquestionable performance. No heat while you start your vehicle and extra responsive acceleration. It quickly burns away the carbon deposits which it stores at the tip of the plug. It improves fuel economy so the new and good spark plugs will save you from undue expenses. The stability in performance due to the idle engine and the presence of the iridium gives efficient electrode.

The responsiveness in this AC Delco iridium spark plug is faster and better. It does not produce exertion and wire of the iridium helps in saving the fuel consumption. So do not hesitate to buy this for your car if you want smooth running car.

this is one of the best iridium spark plug.​

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4. Autolite APP5224 Double Platinum Spark Plug

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Autolite is double platinum spark plugs so it performs far better than single. It is featured with platinum to platinum firing so no question of gap erosion. It is durable and minimizes the misfires. You can expect the superior performance from your car after having good spark plugs like Autolite. It is not expensive and at the same time feature rich. It is compatible with most of the vehicles. This is one of the best spark plugs which has great fit and does not create problem when you go for even long drive as it gives better mileage.

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5. NGK (5464) BKRSEIX-11 Iridium IX Spark Plug

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Another iridium coated spark plug in the top sellers list of best spark plugs, the NGK (5464) BKR5EIX-11 Iridium IX Spark Plug, has a center electrode tip of 0.6mm diameter and a tapered ground electrode.These minimize the quenching effect and ensure high durability and a consistent and stable spark everytime. It has a trivalent metal coating that prevents corrosion and seizing.

This Best spark plug for horsepower has longer insulator nose, triple gasket steal plating and the corrugated ribs and they do their respective job in preventing the fouling, gas leakage and flashover. The Iridium Alloy of this spark plug is having good melting point due to this feature engine will not suffer stress with the maintained heat and electrical wear.

The other features that make this spark plug so desirable areits long nose that prevents fouling, the corrugated ribs on insulator that prevents flashover and a triple gasket that eliminates the risk of combustion gas leakage. The company says that it is specially designed for performance enthusiasts and has a pure alumina silicate ceramic insulator and a copper core. It has 14mm thread size,Thread Pitch of 1.25mm, Reach of 19mm (3/4″), Hex Size of 5/8″ (16mm) and a 0.043″ (1.1mm) Gap.

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6. Denso (3297) SK20R11 Iridium Spark Plug

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Denso Sparks are already very popular in the market and the SK20R11 is one of those that has been well reviewed by users all over. As the name suggests this one is Iridium plated and stands for a long life span and high reliability. The tiny iridium center electrode has a low diameter and hence calls for lower voltage transmissions while generating a spark. This combined with a platinum coated ground electrode makes a spark plug that is not affected even by extreme driving and racing conditions.

Denso Iridium Spark plug is 6 times harder and 8 times stronger than platinum. Whether you are driving your car at rough road car’s engine will perform better. This best spark plug is so reliable and known for its longevity. The stable performance from Denso is superb and there will be no stress when you start your car. Though price is not so high and the features are completely designed to give best to your car.

This spark plug has a 14mm Thread, 19mm (3/4″) Reach, 5/8″ (16mm) Hex Size, Gasket Seat, Resistor, Solid Terminal, 0.7mm Fine Wire Iridium-Tipped Center Electrode, Platinum Tipped Ground Electrode and a 0.044″ (1.1mm) Gap. It is reputed for excellent acceleration and performance and boasts off a stable combustion during idling.

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7. BOSCH (4417) FGR7DQP Platinum+4 Spark Plug

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Bosch is essentially great spark plug. Needless to explain about its richness as it has best of the world when it comes to its features. Its installation is effortless and no need to make adjustment. It has yttrium enhanced ground electrodes that makes the accessibility easy to the fuel. It saves the fuel consumption and makes your car more active to start it with smoothness. There will be no pressure in the engine and it will enhance the longevity of it. It is very low maintenance so you should try out this product to feel the positive difference.

Apart from this, there are many virtue of using BOSCH this model of spark plug. It gives stable performance simultaneously.​

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Bosch YR7MPP33 Double Platinum Spark Plug

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Bosch has been manufacturing spark plugs since 1902. Ideal for forced induction or high compression applications, this double platinum spark plug has a pure platinum center electrode and a laser-alloyed with pure platinum ground electrode. This accounts for a very high longevity and the spark plug can last for a good 1,00,000 kms.

The fine wire design of the center electrode is responsible for high ignitability and performance and call for low voltage ignitions. The continuous 360 degree laser welded technology fuses the corrosion resistant metal firing pin to the base for longer durability. The copper core of the electrodes provides optimal heat transfer, the ribbed insulator design prevents flashover and the nickel plated shell with rolled threads has anti seizing properties. The company claims a five year satisfaction guarantee on the product.

It has a 12mm thread diameter, a 26.5mm thread length, 1.25mm thread pitch, a 90degree tightening angle, a 23NM tightening torque and a 0.80mm Gap. ..

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Best Spark Plug Brand

You should also not forget about the brands of spark plugs. Which is the best spark plug brand? I think it is difficult for many to choose one but I would suggest you some trusted brand of spark plug which is not only good by name but their features will let you fall for this when you will use any of the following given brand then you will not spare yourself by saying that yes this is what you always wanted to have. Here is the list of best spark plug brand, check out the detail.

BOSCH Spark Plugs

BOSCH needs no introduction as it manufactures various things for the vehicles or in automobile industry it has shown its remarkable presence. Basically, it is German based company. Undoubtedly BOSCH comes first in my mind when it comes to have best spark plugs for your car. It gives immense power to your car’s engine and makes it eligible to push the limits. Bosch manufactures many models of spark plugs such as BOSCH Iridium, Platinum+4, Platinum +2, Platinum Plus, Super Plus and more. You will believe when you use its product and will know how it can control the accuracy in performance. It is compatible with all kind of vehicles. It is good for heavy duty as well.

Bosch is good in protecting the wear and tear. The benefits are immense when you use the Bosch spark plugs. It provides quicker start, better and smoother acceleration; enhance cold start potential, no harsh corrosion and durability is best.​

Autolite Spark Plugs

Autolite is American based Company and it manufactures good quality spark plugs and it produces innovative products which is economical. It works so well in the enhancement of the engine functions. When you are replacing your old spark plug to new one then Autolite should your first choice. It is responsive and active in making your car start so frequently. The better ignition and increases the comfort level of driving. Most importantly it saves you from extra expenses of the fuel and very low maintenance it requires. Easy to install. Autolite is best spark plug brand choice for the royal people and comes in budget as well. As I can see there is no drawback I can point when I have Autolite.

NGK Spark Plugs

NGK Spark Plug Co. Ltd is a Japan based Company established in 1936It will save you from hard starting of the car. After its installation you will see the immense difference in the power of the engine and no problem will arise in the middle of the driving as well. This Company manufactures not only spark plugs but also other related products for internal combustible engines. But it has come in India 2006.

When it comes to the NGK Spark Plugs it just builds the strength of the engine. NGK is the right spark plug for the right engine of the vehicles. With the low maintenance it will stay durable. It will be the great replacement with the NGK and its all models are sharp and compatible with most of the vehicles​

Denso Spark Plugs

Denso is again Company of Japan and established in 1949. It does make spark plugs and other auto parts. Denso deals in industrial products. It has built to give best quality products. Its product is durable and value for money. Denso spark plug is so adjustable and installation is good as well. It delivers good performance and enhances the service of the engine. So, no hard starting and smooth driving. The superior fuel economy and it explores more energy. Denso spark plug is guaranteed best service provider.

Best Spark Plugs 2019 Buying Guide

Before going further we need to know a few simple facts about the spark plugs. Firstly, while choosing a spark plug there is no “one size fits all†in this case. So you need to search for a spark plug that fits your vehicle (the thread diameter and reach, the insulator nose projection and incorporated gasket or conical shape) and it’s better to stick to the owner’s manual for the type recommended. Secondly, sparks travel from the sharpest point in the central electrode to the sharpest point in the side electrode. So, the longer the electrode edges retain their sharpness, the longer or more miles will the spark plug last. Thus harder metals with high melting point like platinum and iridium are preferred over the nickel alloy electrodes found in traditional copper spark plugs. Thirdly, the smaller the diameter of the central electrode the lower is the voltage needed to start the spark.

Types of Spark Plugs

  • Copper Core Spark Plugs
  • Iridium Spark Plugs
  • Platinum Spark Plugs
  • Double Platinum Spark Plugs

The details about every type of the Spark Plugs you should take a look as they are different in cost and quality.

1. Double Platinum Spark Plugs

These have the longest life span and had been specially designed for the “waste spark†DIS wherein the spark travels from the center electrode to the side for the cylinder in the combustion stroke and then back from the side to the center for the partner cylinder to return the electrical impulse to the ignition coil. The center tip as well as the side electrodes are welded with platinum for the reverse spark effect. These can be only upgraded to iridium-platinum combo plugs where the side electrode is platinum welded.

2. Copper Core Spark Plugs​

The most inexpensive ones available in the market, the copper spark plugs will last you around 20000-40000 miles. Made from a solid copper core and a 2.5 mm diameter nickel alloy center electrode these tend to erode quickly, the edge looses its sharpness and require a higher voltage to ignite a spark. But being the most conductive out of the four types they provide the highest level of performance which lasts only for a short duration and hence lacks longevity. They are best for older (pre 80s) vehicles and some late model high performance engines that have been designed for copper spark plugs. It’s recommended not to upgrade to spark plugs of higher metals if the owner’s manual asks you to use a copper spark plug.

Know check the iridium vs platinum spark plugs below.

3. Platinum Spark Plugs​

A single platinum spark plug is a step up from the copper spark plug wherein it is styled on the copper spark plug with a platinum plate welded on the centre electrode. Platinum can withstand high temperatures and prevent depositions or fouling and also holds the sharpness of the edge for a longer period of time. These spark plugs can last for a good 1,00,000 miles and are ideally suited for vehicles with electronic distributor based ignition systems (DIS). A platinum spark plug can be upgraded to double platinum or iridium spark plugs but never downgraded to copper ones.

4. Iridium Spark Plugs

Iridium is the hardest metal used in spark plugs but the least conductive. So they tend to last 25% more than even platinum ones. Owing to the high cost of iridium, manufacturers reduce the diameter of the center electrode to as low as 0.4mm. This is not only reduces the cost but also increases the firing efficiency and operate at a much lower temperatures thereby increasing the longevity. The iridium spark plugs are best suited to cars with COP ignition systems and cannot be downgraded to any of the above mentioned spark plugs for optimum performance.

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Final Words

So after referring to the owner’s manual of your car and following the instructions mentioned along with a detailed study of this best spark plugs 2019 buying guide you can choose your spark plug wisely and enjoy a hassle free smooth drive that would also ensure optimal fuel efficiency. Hope it answers your questions and queries regarding spark plug reviews.

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