My 2012 Civic LX has just about 126k and I was overdue on my routine maintenance in replacing the spark plugs. I'm not an expert on engine condition, but based on how they look I am feeling good about how the engine must be doing. These were the factory plugs (NGK DILZKR7B-11GS). Here is a picture of just one (they all look identical) but I would love to hear any opinions on how they look for 126,000 miles.