10 Best Spark Plugs | March 2017
We spent 23 hours on research, videography, and editing, to review the top options for this wiki. There aren't many parts of a car as essential -- and easy to upgrade -- as its spark plugs, which require routine inspection and replacement for proper vehicle operation. And like any car part, there are a variety of aftermarket options out there for increasing the efficiency and longevity of your motor. We've put together a list of great options, ranked in terms of cost, quality, and performance. Skip to the best spark plug on Amazon.
Made for the small engines of lawnmowers and tractors, the Champion J19LM Copper Plus resists fouling and corrosion in cold temperatures, and is also effective for use on generators and marine vehicles. It's a good idea to keep a few of these lying around the tool shed.
- highly conductive
- instructions included
- not appropriate for cars and trucks
The NGK V-Power plugs are rated to operate over a much wider heat range than other options, making them more durable and giving them a leg up over the brand's standard version. They also feature metal plating with anti-corrosion and anti-seizing properties.
- solid copper core
- high alumina ceramics
- good value option
With a four year performance satisfaction guarantee, the Bosch HR7DPP30V can help stem the nagging doubt that sometimes comes with buying average replacement parts. The platinum-tipped plugs are supposed to last two times longer than standard copper ones.
- tapered ground electrode
- laser welded top
- fine wire design
Combining the conductivity of copper and the durability of iridium, the Denso PK20TT is another platinum-reinforced option that is sure to improve the performance of any vehicle. A titanium-enhanced ground electrode helps it stand up under extreme stress.
- twin tip technology
- manufactured by pioneering brand
- affordable price
These NGK IFR5L-11 plugs offer the same level of expected reliability as basic iridium units, but they also happen to be laser welded, ensuring a stronger spark and, as a result, even better performance. Of course, they are a little more expensive.
- feature long insulator nose
- improve gas mileage and emissions
- fit most makes and models
For a seriously long-lasting option, the Autolite APP104 plug incorporates platinum on both the tip and center and side electrodes, making it virtually immune to the kind of carbon fouling and overheating damage that comes with high-end vehicle functioning.
- nickel plated steel shell
- guaranteed for five years
- easy installation
Featuring the latest in spark plug technology, the Bosch Platinum Ir Fusion model combines the brand's patented fused iridium and platinum center electrode with four spaced ground arms to create an extremely powerful ignition connection.
- require no adjustments
- superior quality materials
- self-cleaning design