My 2011 (with 16k miles on it) started idling rough again and triggered the check engine light. The code stated misfires on cylinder 7. I had the same problem 8000 miles ago for which the dealer replaced the spark plug.
I pulled the plug out. It was caked in burnt oil. I brought the truck back to the dealer. The dealer performed a service bulletin that required replacing the drivers side valve cover. The TSB stated the PCV system was redesigned via this new valve cover to prevent excessive oil pooling on the drivers side which leads to misfires on cylinders 1 & 7. The TSB had pictures of what the plug looks like, which looked exactly like my plug. Hopefully this fixes my flowed plug issue.
I pulled the plug out. It was caked in burnt oil. I brought the truck back to the dealer. The dealer performed a service bulletin that required replacing the drivers side valve cover. The TSB stated the PCV system was redesigned via this new valve cover to prevent excessive oil pooling on the drivers side which leads to misfires on cylinders 1 & 7. The TSB had pictures of what the plug looks like, which looked exactly like my plug. Hopefully this fixes my flowed plug issue.