Update
my Ertiga completed 65K kms & running very good. last month replaced tyres to Yokohama earth-1 195/65 R15. old tyre started showing small cracks, although wear tear is only around 60-65% & can be used another 30k kms. for safety reasons i have replaced. it cost me 20600/- for set of 4 tyres. ride quality & braking improves & can easily feel difference. Recently go for a outstation visit with 3 persons & lot of luggage, in one tank full my car covered 714 kms before low fuel warning appear. overall fuel efficiency come up is 20.1 km/lt with tank full method & its of around 150 kms in hills & 70% times AC is ON.