Just wanted to share the fuel average that I got when I took the Liana for its first ever long trip to Lahore via Motorway.
Average was 14.8km/l
Average driving speed from Islamabad to Behra was around 120-125km/h
From Behra to Lahore it was 140km/h (max 160 and min 125)
Because of shortage and low pressure of CNG at Islamabad pumps, I have been running the Liana on petrol for the past 2-3 weeks...so sorry no idea about the CNG from ISB-LHR but on way back the bells started ringing at 180km, avg. speed was a little over 130km.