Hi Mods don't know it this is the right forum for this.

My brother gave me a fuel enhancer it is called a fuel saver.

After using 2 tablets in 3 weeks; the effect was phenomenal.

My car did not consume any fuel for the next 3 more weeks.

Why?

The car cuts out at idle, it cuts out during a high speed operation.
I never used the car again.

Should I drain the tank?