its got 31K on it. its under warranty. they want to believe that the spark plug broke and somehow broke the rod and so forth. I'm suspecting a bad bearing or rod, that was weakened over time and finally broke. or I'm thinking the head gasket blew and caused hydrolock, that would explain the flooded dipstick, because I've read that hydrolock can be caused by head gasket failure, which hydrolock can cause the engine to fail internally by destroying rods, etc. They owe me a new engine, I think they just want to play hardball. I had pinging issues in the engine off and on the past 2 months, plus the idle seemed rough and missing, the engine seemed noisier than your normal ecoboost mustang, my dad is a professional mechanic, he says there is almost no way for a spark plug to destroy an engine. I told Ford about my concerns with the engine several times, they claimed they found nothing wrong during those times I brought the car in