Yes thin carbon steel cookware warps. My wok is a good example of that. But there plenty of high quality thick carbon steel cookware on the market that’s stronger.
What do you mean it leaks oil? I’ve never noticed any like that.
What do you mean it leaks oil? I’ve never noticed any like that.
https://www.amazon.com/Kitchencraft-Non-stick-Crepe-Master-C...
(the reviewers that claim it sticks have not heated it up properly and the peeled off "teflon" is just burned crêpe)
In your case I think that oil gets over the lip and around the pan.