I would double check the egr ports. Hondas are bad for sucking oil into a cylinder if that port is clogged. Can even cause a misfire, have seen it in a few.2013 V6. Im afraid its oil…
Afraid so but not sure. Going to put 5-10k on it and re-check. Car had 50k miles on it when I got it. My fear is the previous owner used the green “eco” button….