If you are to use MEW or Metamask, you cannot have a transaction with 0 gwei. If you can try MEW, the lowest gas price would be 1 gwei only. I think the lowest gas price available to the common wallet is 0.1 gwei. However, if you are to use a customized API for your transaction, you could use 1 wei as gas price. This way you'll pay almost $0 for your transaction. Read this for instance:
linkWhen i checked the ethereum blockchain some users doesn't pay even a penny for eth transaction they using 0 gas.How is this possible??
You seem to mix it up
You can send 0 eth to contract addresses on ethereum Blockchain
But you can’t make a transaction for free
Hope you now understand
what do you mean "you can send 0 eth to contract addresses on ethereum Blockchain" ?
and it seems like i learned something new,
Actually, you can send 0 ETH to any address at will. The "you can send 0 eth to contract addresses on ethereum Blockchain" part is common on those who are sending tokens instead of ETH.
To those who are saying that this is impossible, kindly revisit the link OP provided. The evidence is so clear and yet you people are ignoring the fact.