Which brands of spark plugs are better?

[SanHarley]

Spark plug brands that are considered better include Bosch, NGK, Denso, Suzuki, Three-Dimensional, Makun, Kust, Honeywell, and Autolite. A spark plug is a crucial component in the ignition system of a gasoline engine. It introduces high voltage into the combustion chamber, causing a spark to jump across the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. Under high voltage, the air between the spark plug's center electrode and side electrode rapidly ionizes, forming positively charged ions and negatively charged free electrons. When the voltage between the electrodes reaches a certain level, the number of ions and electrons in the gas increases like an avalanche, causing the air to lose its insulating properties. This creates a discharge channel between the gap, resulting in a "breakdown" phenomenon. At this point, the gas forms a luminous body, known as a "spark." Along with the heat expansion, a "crackling" sound is also produced. The temperature of this electric spark can reach as high as 2000-3000°C, which is sufficient to ignite the air-fuel mixture in the cylinder's combustion chamber.

[OscarDella]

After years of driving, I've gained considerable experience and found that NGK and Denso are exceptionally reliable brands for spark plugs. Their iridium or platinum series, in particular, boast an impressively long service life, easily exceeding 80,000 to 100,000 kilometers, which minimizes the hassle of frequent replacements. With high ignition efficiency, the engine responds more swiftly, delivering a smoother driving experience and even some fuel savings. During installation, pay attention to gap adjustment—neither too tight nor too loose. I've also tried other brands like Bosch, which perform well but fall slightly short in durability. Overall, choosing a reputable brand enhances the driving experience and avoids the embarrassment of roadside breakdowns. It's advisable to select spark plugs based on the vehicle manufacturer's recommendations rather than opting for cheap alternatives, as this could lead to engine issues and costly repairs.

[DiArianna]

As a budget-conscious car owner, I prioritize cost-effective brands when choosing spark plugs. Bosch and ACDelco are my go-to choices—moderately priced with decent durability, lasting about 50,000–70,000 km. Replacing spark plugs noticeably improves sluggish starts and acceleration issues, making the engine run quieter. I also pair this with checking ignition coils and wires to prevent major problems. To save money, stick to regular maintenance intervals and avoid oil buildup to extend spark plug life. Some cheap off-brand options on the market carry higher risks, like misfires or burnout, which aren’t worth it. Experience tells me mid-range brands strike the best balance between performance and cost—definitely worth trying.

[DelBeau]

I enjoy DIY car repairs, and changing spark plugs isn't too difficult. From my experience, the Champion brand is perfect for DIY - simple installation, just plug them in, and barely any professional tools needed. Spark plug quality directly affects engine performance. Good brands make the car start faster, accelerate smoother, and run quieter. Budget-wise, I opt for standard copper spark plugs for their cost-effectiveness. Remember to check the gap when replacing to avoid misfires from excessive spacing. Regular maintenance is crucial - inspect every six months to catch any spark plug wear issues early. In short, choosing the right brand makes life easier and driving more enjoyable.