"I call it Nitrox 3... and a half!"
Monkey created the Nitrox 3 1/2 formula by reverse engineering Tezla's Nitrox 2 formula. Nitrox 3 1/2 is simply Nitrox 2, but it allows the driver to use it in reverse. This allows the user to drive up to 300mph in reverse gear. The fuel was only used twice on screen. The first time is when Tork Maddox tries it on the test track but it blows his engine. The second time is when Taro is drawn into the Drone's Headquarters and uses it to escape back into the portal.