why is my car using too much oil? on 1998 Volkswagen Passat

Why is my car using too much oil?

Asked by for the 1998 Volkswagen Passat
You'll need to have it diagnosed to know for sure, but there are a few things that cause an engine to use oil. They normally involve oil leaking externally or an internal oil leak into the compression chamber. Here are some possibilities:
1. External Oil Leakage
2. Worn piston rings
3. Worn Valve Guides
4. Malfunctioning PCV System