We have been using this black one for the past 1.8 years. Everyday I travel about 65 km in a worst condition road. the speed in which I travel is in and around 50 km/hr. With this consistency, I’m getting millage of about 61 km/lit. Some times, 64 km/lit.
Every 2550 Km I change my engine oil & a I do a general service. Even though its been 2 years, It looks brand new still. Just because I do wax coating(or) Teflon coating once in every 2 months. So far I have traveled about 39, 000 Kms. However, because of all these above said maintenance engine sounds smooth. Comfortable max speed could be around 80-90 km/hr.