Spark plugs are extremely important to maintain engine maintenance. Some drivers may be unaware of this but old, worn, or dirty spark plugs can diminish your engine’s ability to function properly. They could fail to ignite the fuel and air mixture efficiently. Having good and new spark plugs will make your engine run smooth and clean while requiring less fuel.
Best Spark Plug
The best spark plugs are often designed with the newest technology and can achieve high performance while remaining durable. They may come with a higher cost but their ability to increase engine performance will be worth added cost.
1. Bosch (4501) FGR8DQI Platinum IR Fusion Spark Plug
Spark plugs made from iridium may be the best outright performing of any spark plugs available and the main drawback is the high cost. Bosch offers the Platinum IR Fusion to combat some high costs.
It features an electrode in the center made of platinum and iridium blend to increase performance without demanding the cost of an iridium based plug. This is combined with yttrium ground electrodes that are enhanced to have a more powerful spark which creates a more thorough ignition of the mixture of air and fuel.
These spark plugs are extremely durable and are designed to last their entire life without needing maintenance. If you want higher performance and durability then it’s worth the extra couple dollars over traditional spark plugs, the Bosch Platinum IR Fusion is your best option.
2. Denso (5304) IK20 Iridium Power Spark Plug
A major benefit to using iridium in spark plugs is the extremely high melting point which is 2500 degrees Celsius. The Denso Iridium Power spark plug uses a fine-tipped 0.4mm diameter electrode in place of the more traditional wide-diameter offerings to take advantage of this. A standard electrode would likely melt after prolonged use at that diameter, but the Iridium allows for a more controlled spark and ignition process.
Combined with Denso’s exclusive U-Groove pattern ground electrode, iridium power is significantly better than its competitors. However, this premium performance comes at a hefty price tag. If you’re a casual driver it may be hard to convince you to pay nearly triple the cost as other spark plugs. If you are a performance enthusiast or a long-have a long commute, the increased and clean ability of the Denso Iridium Power may be worth considering.
3. NGK (5464) BKR5EIX-11 Iridium IX Spark Plug
NGK is a well respected brand among spark plug manufacturers, and the vast majority of automakers today choose to equip their cars and trucks with NGK spark plugs as stock equipment. The Iridium IX is a great example of how well-sorted a modern iridium spark plug can be. The small-diameter iridium electrode can offer a powerful yet controlled spark. This can give a more thorough ignition, therefore reducing or totally eliminating surging and other ignition-related engine problems.
As with many other high-tech modern spark plugs, the NGK Iridium IX is a low-maintenance design that can be installed easily though it is crucial to check the condition of the spark plugs every once in a while. They are durable and long lasting but they come at a high price tag and should be considered before purchasing.
4. ACDelco 41-103 Professional Iridium Spark Plug
Aside from being an excellent overall spark plug, AC Delco Iridium spark plugs are used by GM as original equipment. Thanks to the higher melting point that the iridium electrode offers, the spark is more powerful than many standard models. The powerful spark gives a mixture of air and fuel which means your engine will run much cleaner and smoother.
The AC Delco Iridium spark plug requires almost no maintenance, although it’s always a good idea to occasionally check gap spacing if you suspect that the spark plugs are becoming worn. These spark plugs are designed to last up to 100,000 miles, and will offer substantial performance for the entirety of their service life.
5. Bosch 4417 Platinum+4 FGR7DQP spark plug
For the big number of drivers on the road today, the Bosch Platinum +4 can be considered as the best all-around spark plug for a standard driver. The Platinum +4 achieves its high performance by employing four yttrium-enhanced ground electrodes while many others utilize only one. This creates a long-term and powerful spark which is better suited to ignite the fuel/air mixture in any engine regardless of its performance.
This spark plug requires no gapping or maintenance – you can simply install these and leave them until you get your next tune up. The price of the Bosch Platinum +4 falls neatly in between a traditional spark plug and Bosch’s Platinum IR Fusion model, meaning it is an affordable option for many drivers.