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...