gentlemen,
recently i tried LPG in my lancer GLX 2006 model using the existing CNG cylinder and existing CNG kit. Also got the hot water bypass done to keep away the log freezing problem. But avg was almost same to petrol even after multiple adjustments to settings.
Pick was good along with the fuelling capacity. Got the cylinder filled from multiple local cylinder shops but no significant difference.
Back to petrol now.. although my cousins are running same experiments in their 1000 cc cultus and khyber with success and getting better milage. Well thats my experience..