What's the 2004 vw passat oil type?

The 2004 VW Passat oil type iS5w-30. Your oil needs to be changed eventually. Every 5,000 to 10,000 miles is a good rule of thumb. If You don't change it, there will be problems with the engine. Having high quality oil is essential for the engine to run smoothly. You will run into issues with this fluid at some point. A normal problem is a nasty burning smell. This needs to be looked into as soon as possible or the car might explode. Bad oil can cause the engine to fail. You could experience bad gas mileage. Knocking noise may show up from the engine.