Dear all,
although i have not kept Cultus but prvious i have a Swift 89, i drove it for 5 years on CNG and petrol and drove to Pir Sohava, Murree, Nathiagali, patriata .............
Never happen to face any inconviniance, it just depend on the vehicle condition and your driving skills but keep one thing in mind, when you try to use your vehicle in these kind of extreme situations, your vehilce speaks itself KE Zulm hua he.
its upto you, how you decide..............