sounds like the engine is worn out. If you believe in miracles and want to try something - you have a slim chance it could work. If the engine was sitting for a long time the rings could be stuck. For what it is worth - try running some engine flush in the crankcase to loosen up and desolve gummy deposits. Change the oil and add a quart of duralube when you do it. Drive the car about 400 miles and see if there is an improvement. My 560 sel sat for 4 years when I bought it and it burned oil 1 quart every 200 miles. I did the above and the rings came unstuck and I use 1 quart every 2000 miles now - I was lucky. If it doesn't work - the motor's toast anyway - might be worth a try - won't cost much.