specially designed, for the constant running of engines, Synthetic Oil, 5W30 Viscosity, Extended ODI of 10,000 Kms, Suitable for all fuel requirements Petrol, Diesel and CNG, Longer Engine Life and Lower maintenance, Better Pickup. Shell Helix Taxi 5w-30 is designed particularly for taxi. it helps to keep engines clean and running efficiently by helping to prevent the formation of sludge and engine deposits.