Happy from car not from tata servicing schedules

From last 2 years I am driving Harrier I have driven around 18000 km . got a few months of drive due to my job. driving and comfort is superb .. mileage. if you say after watching youtube car reviews and all but in real it's a huge diff. I never got more dan 12 .. on the highway it may go to 14. I like to highlight about servicing. first 3 service were no burden. after that they charge me around 15k and my next service is again 18 k . so I prefer better to do service from local mechanics .. atleast they charge for preventative maintenance not for unnecessary maintenance.