Regarding Patrol consumption and CNG settings....
Patrol average is same as you've mentioned 9 to 10 KM/L (bad but its like that)
CNG settings even Authorised Dealers ... (Sama Motors on jail road) and the big showroom/workshop on mintgomery road....They don't even touch CNG settings as they don't have any mechanic who can adjust it properly so they refer someone in Mazung or any other place near Shimla pahari...
And when you go to anyother mechanic they say that settings are all ok .. this car can't do better then this...
So I guess we'll have to live with this performance ...