Best Spark Plugs for Gas Mileage: Reviews 2021 (Recommended!)

by Chris Lewis.

A good spark plug can go a long way. It is an essential part of any vehicle and so must always be in good condition. That is why if you are looking for a spark plug to replace your old one, you should make sure the investment is worth it.

You will want something to boost the horsepower of your engine as well as the performance and improve gas mileage.

To save you the trouble, we have done our research and put together a list of the 10 best spark plugs for gas mileage. There is also a buying guide at the end, plus answers to some questions you may have.


Image Name Ratings
ACDelco 41-962 Professional Platinum Spark Plug
Price Check
4.6 / 5.0
Platinum +4 Spark Plug
Price Check
4.5 / 5.0
NGK 5464 BKR5EIX-11 Iridium IX Spark Plug
Price Check
4.7 / 5.0

Top 10 Best Spark Plugs

You deserve the best, and that is why we have spent hours on figuring out which spark plugs would be right for you. Below, we have listed 10 such products that are truly some of the best. Take a look!

 Top 10 Best Spark Plugs
Top 10 Best Spark Plugs

1. ACDelco 41-962 Professional Platinum Spark Plug

ACDelco 41-962 Professional Platinum Spark Plug
ACDelco 41-962 Professional Platinum Spark Plug

The ACDelco 41-962 is one of the best high-end spark plugs on the market. If you are looking for a reliable plug for your car, this can be just the thing you need. The company is well-known for making reliable motoring parts.

First of all, this thing has a dual platinum tip, which allows it to provide you with a clean, better spark and a lifetime of service. The manufacturers of this product promise high performance, reliability, and just an overall better experience using your vehicle.

This thing does not require much power, and hence a lower voltage, to create a spark. It is possible with the help of the platinum center electrodes and can actually end up increasing the life of your car's battery.

Moreover, this spark plug has been made to be durable. It has a corrosion-resistant shell, which keeps it from rusting.

A common issue many people face with spark plugs is the gap changing. No need to worry because that is something you will not have to worry about this product since the gap stays consistent throughout.

If you find that you are having trouble starting the engine or notice the spark plug boots are damaged, it might be time for you to change to this platinum spark plug. You will not regret it as this product does not leave much room for disappointment.

Pros

  • Very durable
  • Corrosion resisting shell
  • Dual platinum tip
  • Allows fewer misfires

Cons

  • Does not fit all car applications

2. Platinum +4 Spark Plug

Platinum +4 Spark Plug
Platinum +4 Spark Plug

The next product on our list is another great one that is also quite affordable. So, if you are on a budget and looking for a good inexpensive spark plug, this can be just what you need.

This thing has a fine wire design, which does a great job enhancing the performance and offering better ignitability. The platinum firing tip, along with the yttrium ground electrode, this thing offers twice as much longer service than many of the copper plugs.

Its wiring pin also has a low voltage requirement and has a copper core ground electrode that transfers heat better and has a wide heat range to remove chances of pre-ignition and fouling.

It has a nickel-plated shell featuring rolled threads that do not require anti-seize. The nickel shell not only makes it anti-seize but also provides protection from corrosion. There is also no need for gapping as the manufacturers have gone with a ribbed insulator design that blocks flashover.

With this, your car will run smoother, accelerate more, and just perform much better than your old worn spark plug. Just check your car's requirements and see if this will be a good fit for your engine.

Pros

  • Great ignitability and performance
  • No gapping required
  • Prevents flashover
  • Will give a long time service

Cons

  • Not the best quality


3. NGK 5464 BKR5EIX-11 Iridium IX Spark Plug

NGK 5464 BKR5EIX-11 Iridium IX Spark Plug
NGK 5464 BKR5EIX-11 Iridium IX Spark Plug

Are you on the lookout for a spark plug that will provide you with exceptional performance, smooth idling, and better throttle response? If so, we have just the thing for you. The NGK 5464 BKR5EIX-11 does all that and more!

This particular model has been specially designed to provide the best ignitibility and instant throttle response. The 0.6mm fine iridium tip keeps the plug from using too much voltage and boosts durability while also providing a stable spark. Here, the electrical quenching effect is also reduced, thanks to the ground electrode.

This thing will help you get that buttery smooth idling, along with a better performance overall. The way the spark plug is designed is to have insulation for chambers using ribbed insulation grooves.

As a result, your plug has a much lower chance of misfiring. Being an iridium spark plug, this thing has incredibly high durability, which means it will not wear easily and give a long service.

It also has a high melting point, which means it can withstand a lot of heat without getting affected. However, the greatness of this product does come at a price, just like any other iridium plug. That price is quite a high one, but needless to say it is completely worth it!

Pros

  • Very long-lasting
  • Resists corrosion
  • Offers instant throttle response and smooth idling
  • Minimizes risk of combustion gas leak

Cons

  • Quite expensive


4. Genuine Hyundai Spark Plugs 18847-11160

Genuine Hyundai Spark Plugs 18847-11160
Genuine Hyundai Spark Plugs 18847-11160

This next spark plug on our list is another reliable one that is just as good as the others. The Genuine Hyundai Spark Plug 18847-11160 can be a great replacement to your old plug for your Hyundai.

First of all, this 2.4-ounce product will not only have your engine running smoother with greater acceleration, but it will also provide you with a better throttle response.

Not just that, it will also improve your gas mileage, which means it will run better than ever and at a lower cost. It is the perfect OEM replacement for your old plugs that have only been dragging your engine down.

This thing is pretty easy to install as well, so you will be saving some money there if you decide to do it on your own. It even helps your engine run a lot quieter as well. There is not much of a difference in terms of power, but the plug surely works as well as any other does its job pretty well.

This is quite a good product for the reasonable price that it offers. With better acceleration and throttle response and an overall performance boost, this is one of the best spark plugs for Hyundai on the market right now.

Pros

  • Ideal for a Hyundai
  • Easy to install
  • Quite reasonably priced
  • Better acceleration

Cons

  • Not the best at improving gas mileage


5. ENA Set of 8 Spark Plugs

ENA Set of 8 Spark Plugs
ENA Set of 8 Spark Plugs

When you are looking for the best spark plug for gas mileage, it would be a shame not to mention the ENA set of 8 spark plugs. These plugs are some of the best on the market, and we are confident that by the end of this review, you will agree to that!

These plugs are made for original equipment and replacement applications. Every single one of these components works to make the OE design better for quick and easy installation.

They are not only reliable but also offer some of the best performance. Not just that, these are also highly durable and will provide you with better ignitability and improved gas mileage.

This thing has a center electrode tip that does not wear easily and can give you a long time service for years to come. With this, you will not have to worry about issues such as poor gas mileage, engine misfire, and slow acceleration. These plugs are the solution to all of these problems.

For durability, the manufacturers have made sure to make these shock, heat, and vibration resistant.

It even has a sturdy thread and shell for protection against wear and tear. So if you are looking for an affordable, reliable, and easy to install product, this can be a good choice for you.

Pros

  • Great product for the price
  • Offers good power
  • Very durable
  • Heat and shock-resistant

Cons

  • Some complaint about misfires


6. NGK 7090 BKR5EGP G-Power Spark Plug

NGK 7090 BKR5EGP G-Power Spark Plug
NGK 7090 BKR5EGP G-Power Spark Plug

If fuel efficiency is your main concern, the NGK 7090 BKR5EGP is the perfect spark plug to go for. As a plus point, it is also quite inexpensive and durable. So if you think these are things you are looking for, make sure to check out this product.

These G-Power spark plugs promise to provide you with the best performance. Lower emissions and faster starts are some of the areas where this product does not disappoint.

It has a 0.6 mm laser welded fine Platinum tip that ensures low voltage usage, thus increasing durability and more consistently stable sparks.

This thing even minimizes flashover and offers better throttle response. All of this is possible thanks to the specially designed insulator nose with corrugated ribs. The manufacturers have placed a trivalent metal plating, which makes the plug resistant to corrosion.

No need to worry about combustion gas leaks anymore either, as there is a triple gasket seal intended to stop just that.

Overall, this is a very good and affordable product. The materials used to make these plugs not only make sure to maintain the sharpness of the electrodes but also boost the engine life.

Pros

  • Very inexpensive
  • Will last a long time
  • Prolongs engine life
  • No maintenance needed

Cons

  • Not very well made


7. Denso (4504) PK20TT Platinum TT Spark Plug

Denso (4504) PK20TT Platinum TT Spark Plug
Denso (4504) PK20TT Platinum TT Spark Plug

The next product we have is another great but affordable one. This Denso 4504 PK20TT spark plug is an excellent spark plug that can handle pretty much anything with ease. Be it with performance or durability; this product will not disappoint you.

First of all, this thing features a dual platinum construction and uses the twin tip technology. It has an 11mm platinum center electrode with another 11 mm ground electrode, both of which work to give you a reliable and consistent spark.

This allows smooth and complete combustion of the air and fuel mixture, which means you get faster starts, improved fuel efficiency, and just an overall performance boost for the engine.

The manufacturers of this product made sure to include a purified alumina powder insulator that helps boost thermal activity and prolong longevity. That means that this thing can endure a lot of stress without any issues.

There is one issue that some people have mentioned with this product is that the gap on some of the plugs has been set incorrectly. So when installing them, just make sure to check and adjust them if needed.

All in all, this is quite a good product for its affordable price. It is one of the best ones for improving gas mileage and is something that will give a pretty long time service.

Pros

  • Quite affordable
  • Features twin tip technology
  • Quicker starts and smooth combustion
  • Better thermal activity with purified alumina insulator

Cons

  • Incorrect gapping on some plugs


8. Motorcraft SP-515 Spark Plug Pack of 1

Motorcraft SP-515 Spark Plug Pack of 1
Motorcraft SP-515 Spark Plug Pack of 1

Motorcraft spark plugs are ideal for anyone with a Ford. The same holds true for the SP-515, as well as this thing offers great performance and excellent durability.

This is one of the well-liked spark plugs on the market right now, and with good reason. It features platinum electrodes that have already been gapped, which means you will not need to worry about gapping it yourself.

Furthermore, this thing is a direct OEM replacement that you got for your Ford or a truck. Not only will you get some quicker starts and improved gas mileage, you even get some quieter idling.

Before you start to install and use it, do make sure to go through some tutorials if you have never done it before. It is nothing too complicated, but once you use it, you will have nothing but praise for it.

If your engine is running rough, it may be time to replace your old spark plug. And what better plug to go for than this Motorcraft model that will turn your engine performance good as new, much like the first day you bought the vehicle!

Pros

  • Quicker starts
  • Better gas mileage
  • Great quality product and highly durable
  • Quiet idling

Cons

  • Does not fit all car applications


9. E3 Spark Plugs Power sports spark plug E336

E3 Spark Plugs Power sports spark plug E336
E3 Spark Plugs Power sports spark plug E336

When replacing a spark plug, you want your car to perform its best. The E336 spark plug is here to help you with that. It is quite a popular choice amongst many professional drivers as well.

First of all, this thing has been specially designed with colder heat ranges compared to the factory plug. This is done to allow better performance modifications and for it to be able to withstand intense conditions easily.

It features a DiamondFIRE ground electrode, which boosts the amount of combustion pressure produced with each engine power stroke. This ensures an increase in fuel economy, power output, and significantly decreases emissions.

You will find the acceleration is also smoother, with quicker starts to make life more convenient. This thing has a nickel-plated terminal end, which means it will provide complete protection from corrosion at the contact point between this and the engine's ignition system.

The product was not made with the "one size fits all" mindset; rather, it has a specially optimized gap, making it a perfect fit for certain vehicles and boosting performance.

Its electrodes have some sharp edges to initiate electron migrations better. The makes sure the spark is generated more smoothly and provides a significant power boost. All in all, this is quite a good product that you can use to replace your worn-out spark plugs.

Pros

  • Promises smooth acceleration
  • Greater power with less fuel combustion
  • Corrosion-resistant shell
  • Designed with colder heat range

Cons

  • Slightly expensive


10. Set of 8 OEM Platinum Spark Plugs Compatible with AGSF32FM AGSF32FMF4

Set of 8 OEM Platinum Spark Plugs Compatible with AGSF32FM AGSF32FMF4
Set of 8 OEM Platinum Spark Plugs Compatible with AGSF32FM AGSF32FMF4

The last product we have for you is another excellent spark plug that we just had to include on our list. This one is just as capable and reliable as any of the other products mentioned on this list.

Moreover, the platinum spark plugs have been specifically designed to be the perfect replacement to surpass the original specifications. Although platinum plugs can be a bit expensive, their extreme durability surely makes them worth it.

The same holds true for this particular set of spark plugs as well since they promise to give you a long time service.

However, longevity is not the only area where this thing excels. It also significantly improves fuel economy with quicker starts and smoother acceleration.

This thing has quite a good thermal conductivity, which means it can withstand very high temperatures without much trouble. You can easily run 1,00,000 miles with this thing after replacing your old plugs.

This really is one of the best and most loved spark plugs for gas mileage. Although it may be a bit out of the budget for many, it is still slightly less expensive than other platinum spark plugs.

So, if you think this is the type of spark plug you are looking for, make sure you check it out and see if it will be a good fit for your vehicle before making a purchase.

Pros

  • Great quality platinum plugs
  • Improves gas mileage
  • Faster starts and smoother acceleration
  • Will go a long way

Cons

  • Maybe a bit expensive

What to Look for While Buying Spark Plugs for Gas Mileage?

Well, that is all that you need to know about these products. However, the journey to finding the best spark plug is far from over. Below, we have prepared a buying guide for you to see the things that you need to look for when buying a spark plug.

Material

The most important thing you need to look at is the material the plug is made of. These are usually made of three materials, which consist of copper, platinum, or iridium. Most of the plugs you will come across will be copper ones. For older car models, copper spark plugs will do the job just fine.

However, for more modern models, platinum and iridium would be better suited as not only do they have a higher melting point, but they are also much more durable with a better performance boost.

It should be noted that these also tend to be more expensive than the copper plugs, especially the iridium one.

Vehicle Type

Even the material of the plug does not matter unless you know what exactly it is that your car needs. As mentioned earlier, some older models require the use of copper plugs, while the modern ones are more suited to platinum and iridium ones.

However, that is not always the case, so you should first find out what is best suited for your vehicle and choose a product accordingly.

Gap Size

Spark plugs are never a 'one size fits all' type of thing. Which electrode gap you need solely depends on your car. One thing you should know is that a larger gap means it will require a higher voltage to initiate the spark.

Newer car models tend to be highly efficient, giving you the same result even with a lower voltage. So for this, an electrode with a small gap will be enough.

Functionality

Since we are talking about the best spark plugs for gas mileage, this particular thing needs to be considered. Spark plugs tend to be similar but not exactly the same.

So, some of these can have better horsepower, gas mileage, or throttle response compared to others. That is why you need to carefully consider the things your choice of the plug has to offer.

Insulation

Every plug type you come across will have ceramic insulation that keeps it protected from the heat of the electricity. Still, whether a plug is classified as a cold or hot one depends on the amount of insulation.

A hot plug is one that has less insulation but burns hotter. Most high-performing cars prefer cold plugs because the engines run at a very high temperature, which can cause damage if paired with a hot plug.


Types of Spark Plugs

Primarily, there are four types of spark plugs. These include copper, platinum, iridium, and double platinum.

  • Copper core

The standard copper core plugs are made for older cars that run on carburetors. These are the ones with the electrodes with the biggest diameter. However, these are also quite inexpensive compared to the other ones.

  • Platinum

Platinum plugs have a long life but are not the best when it comes to performance. They can go up to 100000 miles without any issues and are best suited for cars that have a distributor based system.

  • Iridium

Iridium plugs are the best at everything, be it performance or durability. These also use electrodes with the smallest diameter out of all of them.

However, the incredible performance and longevity come at a high price since these plugs are also the most expensive.

  • Double Platinum

Despite the name of "double platinum", the plugs are really nothing special and not much better than the platinum ones. They perform slightly better than the latter, but for many, it is nowhere near worth the cost.

Many even refer to this as a waste of spark. However, it can vary from one product to another since no two plugs are exactly the same.

Can Spark Plugs Improve Gas Mileage?

Spark plugs actually can have a positive effect on gas mileage by improving it. A bad plug can significantly reduce your fuel economy by about 30 percent. If you find that the gas mileage of your car has suddenly dropped, it can be due to the misfiring of your spark plug.

In such cases, replacing the spark plug can solve this problem. Getting some fresh spark plugs can result in better gas mileage, be it a copper, platinum, or iridium plug.

However, a platinum plug will likely help you get away with more miles at a lower price, providing a positive effect on your gas mileage.


Spark Plug Frequently Asked Question

1. What is a spark plug?

A spark plug is an important part of the ignition system in a motor. The type of plug used by a car can differ from one to the other, but you should always use a reliable plug and replace the old one if it gets worn out.

2. How do they work?

They ignite an air and fuel mixture by transferring electrical energy over the gap between the firing ends. This spark then produces complete combustion to move the pistons and provide enough power to start the engine.

3. Do spark plugs provide a difference in performance?

Yes, they really do. Compared to an old, worn-out plug, a newer one will provide you with more power and boost performance.

4. How often should you change spark plugs?

There is no definite amount of time period to change spark plugs. Just keep an eye on gas mileage, any oil leaks, or just the overall performance of your car. If you see any change for the worse, it might be time to replace the plugs.

5. Will a new spark plug give better gas mileage?

Yes, a new spark plug can actually improve gas mileage. There is research that shows a bad plug can reduce your fuel economy by 30 percent. So, getting a new one will certainly boost gas mileage by a lot.

Final Words for Spark Plug Buyers

Spark plugs are a very important part of your car engine, and so should hold some standard. The ones mentioned on this list are really some of the best spark plugs for gas mileage. Did you find any that you liked?

If you did, make sure you go through the buying guide to see if it fits the requirements. We hope we were able to answer any questions you have had as well.

Buying the right spark plug does not have to be difficult. Just follow our guide, and you will be well on your way!

Buy on Walmart

NGK 7090 BKR5EGP G-Power Spark Plug, Pack of 4 - Walmart Link

Bosch Automotive 6702 Platinum Spark Plug for Select Chrysler, Dodge, Honda, Hyundai, - Walmart Link

6 PCSNEW -- DENSO #4503 PLATINUM T T Spark Plugs -- PK16TT - Walmart Link

Autolite AP5263-4PK Platinum Spark Plug, Pack of 4 - Walmart Link

GM Genuine Parts 95202866 Cocoa Door Mirror Remote Control Switch - Walmart Link

6 New NGK Iridium IX Spark Plugs BKR5EIX-11 # 5464 - Walmart Link

Bosch 4417 Platinum+4 FGR7DQP spark plug(Pack of 6) - Walmart Link

Buy on eBay

NGK 7090 BKR5EGP G-Power Spark Plug, Pack of 4 - eBay Link

Bosch Automotive 6702 Platinum Spark Plug for Select Chrysler, Dodge, Honda, Hyundai, - eBay Link

6 PCSNEW -- DENSO #4503 PLATINUM T T Spark Plugs -- PK16TT - eBay Link

Autolite AP5263-4PK Platinum Spark Plug, Pack of 4 - eBay Link

GM Genuine Parts 95202866 Cocoa Door Mirror Remote Control Switch - eBay Link

6 New NGK Iridium IX Spark Plugs BKR5EIX-11 # 5464 - eBay Link

Bosch 4417 Platinum+4 FGR7DQP spark plug(Pack of 6) - eBay Link

About Chris Lewis.

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