Abstract: A dual-fuel conversion system that introduces natural gas into at least one engine cylinder and replaces diesel fuel with a replacement pilot fuel for ignition. The system includes replacement injectors that mount to an injector adapter that replaces the original diesel fuel injector, a control computer that is reprogrammed to control timing of the replacement injectors, and replacement fuel components to distribute natural gas and a pilot fuel to the at least one engine cylinder.

Abstract: A system for monitoring the emissions performance of a vehicle by scanning an OBD system of the vehicle and transmitting the information to a hub. A determination is made whether the engine of the vehicle is in a non-compliant state. The non-compliant state including a failure of an oxygen sensor that causes a hub to control a refueling dispenser that presents a message confirming that the vehicle is in the non-compliant state on a display at the refueling dispenser and automatically levies a fine against the owner of the vehicle for being in the non-complaint state when the user or owner pays to refuel their vehicle. The fine is remitted to the regulating authorities.