Thank you for reaching out.
On highway, 11 km/L with AC is below the normal range for Cultus 2013, as most users achieve around 14–16 km/L. To improve fuel efficiency, we recommend:
Computerized diagnostic scan (check sensors like O2, MAF, etc.)
Throttle body and injector service
Correct tyre size and proper inflation
Good quality fuel and recommended engine oil
Engine compression test if issue persists
For Lahore, we suggest visiting a reliable Suzuki-authorized workshop such as Suzuki Township Motors or booking a PakWheels Car Inspection for a detailed diagnostic.