That plug looks almost perfect to me. It's clean with no signs of burning. If our engines were water cooled you might see a bit more color around the perimeter. I'd throw a new one in three and be happy.
Also, 155 is way rich IMO if your motor is mostly stock. I think most people on here mistakenly think they should see some carbon fouling on their plug. You want clean a very light tan at the most.
Edit:
https://www.championautoparts.com/Parts-Matter/automotive-repair-and-maintena...