It really comes down to a matter of preference to be honest. And both points are valid; fans are tried and true. But you also need to take into account that the molecular density of the product allows it to absorb more heat than water. (Careful to remember thermodynamic fluidity, that absorbing more heat does not necessarily make an atomically heavier substance hotter). This, in turn with being able to dissipate heat faster, means less heat in the engine, more being radiated to atmosphere. I have used an infrared thermometer on several occasions to disprove my own skepticism early on when I started using liquid intelligence. My bike won't run hotter than 93 degrees, in winter its even less due to cooler ambient temperatures, unless of course there are some real good hills...!!