NHTSA Complaint #11555340 — 2017 HYUNDAI ELANTRA

The entire engine failed and threw a rod on cylinder 3. My safety has been put at risk twice since the beginning of the engine troubles. The safety issue is I was merging onto a busy highways just fine until the accelerator wasn't doing anything. So frantically I had to start checking Visuals and there were none. There weren't any warning signs of the impending doom of the engine. It would just die out of no where like someone unplugged it, but then it would start right back up. Upon Making it home safely, thankfully. I start looking at all the basics and decided to change the oil as well as it was coming due in mileage very soon. To my surprise I was a missing half of the oil I put in it last change. There are no oil puddles or marking where I park my car nor have I seen any oil leaks after driving it for a while. It's like the oil disappeared. Needless to say the oil was quite dirty looking but no metal chunks or pieces and low some how. That same night I was driving and out of no where I heard a knocking and within seconds of that mh car died/stalled/seized up. Rendering the car useless and could of been a very serious safety issue has it happened in traffic. I couldn't stare it or anything, buy luckily somehow just made it to the shoulder barely before it stopped for good. 2 questions. 1) where did my engine oil go as I know I put just under 5 qts of fresh oil in it in August and only a couple months later the issue started and I had almost been running the engine dry due to excessive oil consumption of the engine amd I never received a low oil light or anything warning on the dashboard 2) how the heck did the original brakes last longer than the not even 7 year old engine? 3) why is nothing being done to help us out as I seen hundreds of the same type of complaint. Low oil engine from excessive consumption, the random power cut offs, and the knock emanating from the same exact place as others in the engine. BigManufacturers defects