A very common issue in BMW 3 Series E90 models is engine oil consumption. Owners often notice that oil levels drop significantly even after short trips.
Symptoms
- Oil warning light comes on
- Blue smoke from the exhaust
- Frequent need to top up oil
- Reduced engine performance
Possible Causes
- Worn piston rings and cylinders
- Hardened valve stem seals
- Oil leaks in the turbo
- Gasket or oil filter housing leaks
Solutions
- Inspect piston rings and pistons
- Replace valve stem seals
- Turbocharger overhaul
- Replace gaskets
Preventive Maintenance
- Use original or correct viscosity engine oil
- Check oil level every 8–10k km
- Avoid prolonged high-rev driving
Conclusion
If ignored, oil consumption may lead to a full engine rebuild.
