B-12 Chemtool (#0116, #0112, #1112) only marginally boost octane, less than 1 point. However, since engine performance can be negatively impacted by poor quality fuel and lack of proper maintenance, some people equate poor acceleration, rough idle, knocks, and pings with octane deficiency. These performance problems can most likely be attributed to fuel quality and build-ups in the fuel system, injectors or carburetors and in the combustion area. B-12 contains High Energy Solvent Technology to effectively remove these performance-robbing build-ups and adds punch to poor fuel. If the performance problem is not related to octane, you can actually feel the difference B-12 makes when added to the gas. And then, if you truly want octane boost, check out our #1512 Octane Booster Fuel Treatment (#1515 in Mexico).