@mfdarvesh
Yes first i love Nissan diesel but only specific engine CD20 coz it is way more powerful and Hi-Speed Engine than any other 1700-2000cc diesel engine... 2ndly its maintenance & fuel cost is way much less than petrol or CNG Engine, Even than Toyota 2c.... and no tension about tuning or plugs or head settings...
It gives me 14-15 km/ltr with AC in local and 18-19 km/ltr on long route that too on constant speed of 160 - 175 km/h