Castrol India Limited supplies Lubricating Oil for Hotter Gas Engines. Castrol India Limited is an ISO 9001- 2000 recognised company a wide range of automotive and industrial lubricants for passenger car engines, trucks, motorcycles and scooters. The Lubricating Oil for Hotter Gas Engines, available under the brand name "Castrol GTX CNG" is used for lubrication of engines fuelled by CNG/LPG under wide range of loads and driving conditions for on-highway vehicles like autos, taxis and passenger cars.