I bought suzuki sling shot on fab 2011.i m working as pharmaceutical marketing in bangalore.for me its normal run as an average 40/50km/day.its very comfort, stylish.when i bought early time that time i got mileage as 52/53 km/l but as servicing go on on timely i got mileage exactly 59.6 km/l in bangalore.u know bangalore has huge traffic but its front disc brake its become extra safety and looks to competitive world.dear friends suzuki sling shots mileage and its performance is depends on how u handle and care.my advice u give service on timely as company has given guidance and wash the vehicle once in a week.
Fill petrol in a good dealer. You will get exact performance.