for past couple weeks car wont hold oil. Tried 3 diff stop leaks. Didnt work

What is your question?

If i put 4 quarts in, my dash reads, 92% oil life. Within two hrs, dip stick bare. Tried stop leak, didnt work. Acts like its not getting gas. Bad battery. 28 codes. Just bought 2002 seville

What makes this problem better or worse?

Same

How long has your 2002 Cadillac Seville had this problem?

3 weeks