>>28614303
I'm debating if I should move up to colder spark plugs based on my driving. I'm running a EDM EK Civic with a stock D15Z6, and I noticed the engine started pinging noticeably since I started driving more on highways, I think it might be spark plugs too hot for it. Current ones are the NGK ZFR5J-11's recommended by Honda, but on that they also say to move up to the colder ZFR6J's in warmer climates or if the car does a lot of highway driving.
I live in a southern Europe area that is quite warm, summers can get up to 40C/105F and even the absolute lowest in winter never drops below 0C/30F, I usually drive around 70 Km/45 miles daily, half of that on highways, and pic related is how the current spark plugs look, all 4 look about the same, it seems to me they might be running a bit hot. You guys think the 6J's would foul too much based on this?