Hero Motocorp — fuel consumption low mileage

Address:

Indore, Madhya Pradesh, 452001

Hi
My bike has start consuming enough fule and slow in low speed, its not giving proper mileage even i had been to service center2 time but problem still not solved after spend thousands of rs.. Its feel love ke i am riding yamaha bike.
What about hero whome we know for fule efficient bike manufacturer
Please resolve this. Bike hero ignitor

Thanks
Jai
[protected]@gmail.com