My car has 193,000 miles on it and is starting to use oil. It used a quart every 7000 miles for the first 150,000 miles then started to increase. Its using a quart every 2000 miles now. I'll keep driving it until it gets worse but I'd like to know if I am better off replacing it with a used or remanufactured engine or should I have it rebuilt? Does anyone know where I can buy a used or remanufactured engine for it?