NHTSA Complaint #11534270 — 2015 HYUNDAI SONATA

I am unsure what exactly happened but it is giving an error code for the engine sensor. I was driving the expressway (55-65MPH) and my car went directly into safe mode. Which I didn’t kno what it was til later. I went from going expressway speed to almost getting t-boned getting off of the exit ramp as I was unable to accelerate over 2RPMs. So my acceleration would jolt my car when going over 2RPMs. I made it to a gas station where I had my mechanic friend meet me. He said I had no oil. We put 4 quarts in and it barely did the job! I had gotten my car serviced and oil changed not too far from when my car began to “shut down”. So oil is in the compartment, the engine light turns off. Well then I’m driving the expressway AGAIN thinking the problem is solved but also curious WHY and HOW I had no oil. All of a sudden the car goes back into the mode. Engine light comes on an I am once again going de-accelerating in traffic on an expressway. I get off an exit and make it home in back roads. I had to pay for rentals and I was unable to get it to the Hyundai manufacturer. I got it to another certified mechanic which stated there is an oil leak somewhere but is unable to be found. As the 4qts added days prior, was almost gone again. The engine sounds awful, there’s rattling noises, noises sounding like a fan is broken but still spinning. There was absolutely NO warning signs prior. Nothing was on, nothing was off, absolutely NOTHING to forewarn me of this awful situation until it decided it was going to safe mode on the expressway out of nowhere. I owe thousands of dollars in rentals, I can’t afford to even pay that off! For Hyundai to diagnose my car, they wanna charge 80$! When I already have the error code from the previous mechanic. I don’t have the money to be doing this funny business. The car actually turned off when I was driving it and was in like an idle mode or something. I have no clue. Nobody has any idea where the oil goes. It isn’t showing smoke anywhere