The best spark plugs are those that resist fouling and deterioration. Of course, you can’t expect the spark plugs in a modern engine to last forever, even if you choose the more expensive variety.
But choosing the best spark plugs is easy. Just check the owner’s manual. Using the wrong type of spark plugs will not damage the engine, but it may significantly deter engine performance and emissions in the long run.
In order to make things a bit more interesting, I divided this list of the best spark plugs into three different categories: best standard spark plugs, best high-performance spark plugs, and finally the best iridium spark plugs.
You might think its common sense that a V8 engine should have eight (8) spark plugs, but this depends on the type of V8 motor. So in order to answer the question of how many spark plugs are in a V8 motor, it is important to figure out the kind of V8 motor in your vehicle.
However, it’s a given fact that ordinary V8 motors will have a total of eight spark plugs. That’s one per cylinder. The same goes for V6 motors or four-cylinder engines with six and four spark plugs, respectively.
But there are some V8 motors from European and American brands that utilize dual-ignition or twin-spark technology. If this is the case, a V8 motor will have more than eight spark plugs.
The engine in your vehicle is like an orchestra. Every player should be in the right tune to produce good music. You can think of the spark plugs as an integral part of the motor. Spark plugs create miniature lightning strikes inside the combustion chamber to ignite the air and fuel mixture.
And if you know anything about cars, igniting the air/fuel mixture is a good thing. But what happens when the spark plugs are worn out? When is the right time to replace the spark plugs? Can you do it yourself, or should you consult a professional? All the answers are right here.
But first, here’s the answer to the most glaring question of all.
In some modern vehicles, the check engine light or the service light will illuminate when the spark plugs need replacement. But in the absence of such features, how will the average Joe determine the right time to replace the spark plugs?
If you recently bought a used car, you are better off replacing the spark plugs altogether, even though the previous owner swore upon his life that the spark plugs are new. You should also change the oil and oil filter while you’re at it. Buying a new set of plugs is cheap insurance against breakdowns and engine damage.
But if you have a new car, the best way to determine if the spark plugs need to be changed is to consult the owner’s manual. Depending on the type of vehicle, the manufacturer recommends replacing the spark plugs every 30,000 to 80,000 miles. In some cases, a vehicle can go for as long as 100,000-miles before needing a new set of plugs. More reading on best spark plugs here.
There’s a lot of talk about NGK vs Denso and which is better between the two spark plug makers. But we have to be honest here.
You see, there is no definite answer. All the rumors about NGK vs Denso are probably just the result of plain old gossip from rumormongers. The best type of spark plug for any type of vehicle can be found in the one thing that most car owners neglect: the owner’s manual.
Modern engines are manufactured using extreme tolerances. Any degree of deviation from a faulty or wrong part will significantly affect the engine in a variety of ways. I’m not just talking about the spark plug here. Changing or modifying basic engine components such as the air intakes and the spark plug wires might not always result in squeezing out the best possible performance.
Sadly, it’s the same with spark plugs. And it doesn’t even matter if the spark plugs are NGK or Denso.
Until the late 20th century, diesel fuel additives were not so much of a hot topic. Due to the robustness and versatility of the diesel engine, suitable diesel fuel is made from a mixture of straight-run distinctive distillation elements. With the increasing demand for fuel, the demand for diesel fuel additives has also increased. Even though there is no particular definition of what exactly an additive is, the consensus is that an additive is something added at less than 1% w/w (i.e. 10,000 mg/kg or 10,000 ppm).
Owing to this low additive rate, the physical features of the fuel, like its volatility, viscosity, and density, does not change significantly.
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