The Lorentz force, or electromagnetic force is the force that will undergo a charged particle in an electromagnetic field ... it has NO EFFECT on the vaporization of gasoline or its distribution in the cylinder. This object (which is a magnet in a tube) is a scam that Amazon should remove most of its sales quickly.
There are two positive reviews about the products, I do not know if they are accomplices or people preferring to lie rather than admit scammed, but I can assure you that this will have no influence on your consumption.