2000 Lincoln LS whats the problem

Hello, I own a lincoln LS year 2000 168,000 miles on the car, recently I was driving down the road when I suddenly heard a breaking noise under the car near the rear tires -- the car lost power and the ability to steer -- I came to a complete stop and turned the engine off, I let the car cool off for about 10 Min. Or so and continually tried to start the engine -- I heard it clicking and turning over but it wouldnt completey start-- I tried this for about ten min. Finally I gave in had the car towed about an hour later the car would start but it had a deep knocking noise along with a tramendous amount of vibration -- the engine was shacking and knocking -- very loud and nasty sound --- I was tolded by two different auto M. That I blew the engine



my question: is the engine really blown and if not what is wrong and what would cause this?


in addition I just had an oil change and the car had a quater of a tank of gas during this ordeal?