Would E3 spark plugs actually make a difference in the Cayenne?

I've seen them post supposed dyno results showing a slight increase in power and also claims that it improves mileage too. What they're saying is believable and somewhat has supporting proof. But I wont believe it until I have first hand experience with it.

tried them before. huge waste of money. in fact they made the engine perform worse. nothing beats using oem spark plugs. since the gap and heat range are exactly what manufacturers recommend. most oem manufacturers use ngk anyway and ngk is an amazing brand.

Nothing really beats OEM. Although I've tried using copper plugs instead of platinum and I did notice a slight change in power and gas mileage. One of my friends that does tuning said its because copper is a better conductor of electricity. Only downside is they wear down a lot quicker than platinum or iridium plugs which means you have to replace them more frequently.

OEM it is then. Thats why I like to ask questions first before I spend money. That way I dont waste money on useless parts. Plus Ive always had good experience with NGK on all my other vehicles so why bother changing when theres nothing wrong.

I've been using them on my 2004ctt and the engine is a lot smoother. Fuel consumption decrease a little bit.quite happy with them

Does anyone used pulstar spark plugs, they claim a lot advantage for hp, and mpg.

Has anyone tried NGK iridium plugs?