When tin-antimony alloy, is placed in the fuel tank of any petrol or diesel vehicle, it causes the fuel to act as a self-cleaner as it combusts. Removing existing deposits and keeping the engine permanently clean and efficient.

And because tin-antimony doesn’t dissolve, breakdown or wear away in fuel, it never needs to be replaced or topped up. And goes on working for as long as it's in the fuel tank.

Rather unpopular with the motor industry. But great news for motorists, pedestrians and the environment.