Do Iridium Spark Plugs Improve Gas Mileage

Iridium spark plugs are said to improve gas mileage, but do they really? Iridium is a precious metal that is six times harder than platinum and has a much higher melting point. This makes iridium an ideal material for spark plugs.

Proponents of iridium spark plugs say that they last up to five times longer than traditional copper spark plugs and can improve fuel economy by 1% to 2%.

Spark Plug Experiment and MPG

If you’re looking to improve your gas mileage, you might be wondering if iridium spark plugs are worth the investment. Though they tend to be more expensive than traditional spark plugs, they also boast a longer lifespan and better performance. So, do iridium spark plugs actually help improve gas mileage?

There’s no definitive answer, as gas mileage is affected by a variety of factors including driving habits and vehicle type. However, some experts believe that iridium spark plugs can slightly improve fuel efficiency due to their higher firing efficiency. In other words, because they create a stronger spark, they can help burn fuel more completely which could lead to better gas mileage.

Of course, there are other ways to boost your car’s fuel economy without spending extra money on fancy parts. For example, making sure your tires are properly inflated and getting regular tune-ups for your engine can also go a long way in improving gas mileage. So if you’re looking to save some money at the pump, consider trying out a few of these simple tips first before splurging on iridium spark plugs.

Disadvantages of Iridium Spark Plugs

If you’re considering using iridium spark plugs in your car, you might want to think twice. While they offer some advantages over traditional spark plugs, there are also some significant disadvantages that you should be aware of. One of the biggest disadvantages of iridium spark plugs is their cost.

They can be up to 10 times more expensive than traditional spark plugs, so if you’re on a budget, they may not be the best option for you. Additionally, because they’re made with such a hard material, they can be difficult to remove once they’ve been installed. This can make changing them out a real hassle if you’re not careful.

Another downside to iridium spark plugs is that they tend to wear out more quickly than other types of spark plugs. This means that you’ll need to replace them more often, which can add up over time. Additionally, because they require such high temperatures to function properly, they can actually damage your engine if not used correctly.

So if you’re not sure what you’re doing, it’s best to avoid them altogether.

Do Iridium Spark Plugs Improve Gas Mileage


What are the Best Spark Plugs to Improve Gas Mileage?

There are many factors to consider when choosing the best spark plugs to improve gas mileage. The type of engine, driving conditions and the age of the vehicle all play a role in determining which spark plugs will offer the best performance and fuel economy. For example, newer vehicles with fuel-injected engines tend to run better on iridium or platinum spark plugs.

These materials help reduce wear on the electrodes, resulting in a more efficient combustion process. However, they can be more expensive than traditional copper or nickel spark plugs. Driving conditions also impact spark plug selection.

If you typically drive in stop-and-go traffic or short distances, fouling can be an issue. In these cases, it’s often best to choose a hotter-running plug that can withstand the build-up of deposits. Conversely, if you do most of your driving on highways or other open roads, a cooler-running plug may provide better fuel economy by reducing unnecessary heat loss.

Finally, keep in mind that older vehicles may require different types of spark plugs than newer models.

Does Iridium Spark Plugs Make a Difference?

If you’re looking for better performance from your engine, iridium spark plugs could be the answer. These plugs feature a small iridium tip that is more durable than traditional plugs. This means they can last longer and provide a better spark, which can lead to improved performance.

Iridium plugs are designed to handle higher temperatures and pressures, so they can also withstand extended periods of use without wearing out. This makes them ideal for high-performance applications where engines are under constant strain. And because they produce a more consistent spark, they can help improve fuel economy as well.

If you’re considering upgrading to iridium spark plugs, it’s important to consult with your mechanic or dealership first. They can advise you on whether these plugs are right for your particular vehicle and driving habits.

Can Spark Plugs Increase Mpg?

If you’re looking for ways to increase your car’s fuel efficiency, you might be wondering if spark plugs can help. The answer is yes – in some cases, new spark plugs can improve your miles per gallon (MPG) by up to 2%. How do spark plugs affect MPG?

Spark plugs are responsible for igniting the air/fuel mixture in your engine’s cylinders. Over time, they can become fouled or damaged, which can negatively affect engine performance and fuel economy. In fact, a misfiring cylinder can cause a 10% drop in MPG.

Replacing worn-out or damaged spark plugs can therefore help restore lost power and improve MPG. When should I replace my spark plugs? Most automakers recommend replacing spark plugs every 30,000 to 50,000 miles.

However, this varies depending on the type of vehicle and driving conditions. If you frequently drive short distances in stop-and-go traffic, for example, your spark plugs may need to be replaced more often than someone who mostly drives on the highway. Ultimately, it’s best to consult your owner’s manual or a qualified mechanic to find out how often you should replace your specific vehicle’s spark plugs.

Should I Upgrade to Iridium Spark Plugs?

If you’re considering upgrading to Iridium spark plugs, there are a few things you should know. First, Iridium plugs last significantly longer than traditional copper or platinum spark plugs – up to four times as long, in fact. This can save you time and money in the long run, as you won’t need to replace your spark plugs as often.

Second, Iridium plugs provide better engine performance. They create a more powerful spark that ignites fuel more efficiently, resulting in increased power and torque. Additionally, they help improve fuel economy by up to 1%.

Finally, while Iridium plugs are more expensive than traditional spark plugs, they pay for themselves over time with their longevity and improved performance. So if you’re looking for an upgrade that will save you money and improve your vehicle’s performance, Iridium spark plugs are the way to go.


Iridium spark plugs are said to improve gas mileage, but there is some debate on whether or not they actually do. Some say that iridium spark plugs can improve gas mileage by up to 2%, while others claim that the improvement is closer to 1%. There are a few factors that can affect how much of an improvement you see, including the type of vehicle you have and how often you drive.

If you’re looking for a way to improve your gas mileage, iridium spark plugs may be worth a try.