So I've had my 2011 5.0 for about 6 months. I bought it with 85k miles and now its at 92k. A couple of months ago my cyl 8 started misfiring so I pulled the plug and noticed it was black asf, so I changed all of them. 3 days later my misfire comes back so i pull the plug again. Oil. Damn. So cylinder 8 is done. When i bought it, guy said it had a BAMA 91 Race tune and an Airaid Intake. Guessing the tune is what did the most damage. Anyway i get a misfire at idle and a quick puff of smoke out of the exhaust pipe from bank 1. So i'm guessing its the rings. Specifically the oil control rings. That's based off of basically just a guess. So my question is, in this case do I get another engine? Or can i just get that one piston ring replaced? Not that i can affored either right now lol.