Thankyou didi for this wonderful tip.
I have seen a huge difference of charging LPG cylinder cooking gas with VK.
The charge cylinder gives approximately 10 days more everytime.
Once i forgot to charge my gas cylinder and it last for 25 days only.
Personally i also charge my cylinder and appliances with SHIELD OF SEVEN RAYS for protection.
Thankyou @"Sharat Sir-VK Inventor" ji VK is a perfect solution everywhere.