Thank you for reaching out.
For a Cultus EFI 2007, the mileage you’re getting (11 km/L in city and around 15 km/L on long routes) is quite normal considering the age of the car. A few factors can still affect fuel economy:
Driving habits: Sudden acceleration, unnecessary idling, and heavy braking reduce mileage.
Tyres & alignment: Over- or under-inflated tyres and poor wheel alignment can lower efficiency.
Engine tuning: Even after cleaning injectors, plugs, and filters, a proper computerized tuning or throttle body service can help.
Fuel quality: Using low-quality or adulterated fuel impacts performance.
Mechanical condition: Weak engine compression, worn-out sensors (like O2 sensor), or faulty thermostat can also be factors.
What you can do:
Get a computerized diagnostic scan to check sensors.
Ensure regular engine oil change with the recommended grade.
Monitor tyre pressure weekly.
Try a different reputable fuel station.
If the engine and all components are healthy, your current mileage is within an acceptable range for this model.
