If I don't add Bell Hammer Seven at every oil change, will it lose its effect?

We recommend adding it every time.
The main purpose of Bellhammer Seven is to reduce the composition of metals to a state of low friction.
Since the friction coefficient of the friction part does not become zero, even if Bellhammer 7 is used to create a low friction condition, it will eventually wear out. To prevent this condition from occurring, it is desirable that Bellhammer Seven is always present in the internal combustion.