I use most of the hypermiling techniques and they are really very useful.
2012 Corolla GLI - 14.5km/l on Motorway at speed of 110-120 km/h its only 2400 km driven by now and I have read a few posts which mention that its average improves with its usage.
2003 Civic EXi Manual - Usually I get 15 km/kg without AC in city driving. About 14.5-15 km/l on highway at speed of 100-110 km/h. Currently trying to get the average on petrol in city driving and I will mention it soon.
Toyota Landcruiser, 1989 model, 3980cc, 6-cylinder, diesel engine, 7-7.5 km/l in city and 10 km/l on GT Road at a speed of 90-100 km/h.
The average which I get with my cruiser amaze me alot mashallah.