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.