supercritical fluid =50% improved fuel efficiency

Interesting article to read about a company developing a new sort of fuel injection technology. Apparently there may still be life in the internal combustion engine. “Transonic’s injection system varies from direct injection in two ways: it uses supercritical fluids and doesn’t require a spark to ignite the fuel. The supercritical fluid mixes quickly with air when it’s injected into the cylinder.” So somewhat like a diesel but the fuel is at a state thats not truly either a liquid or a gas... interesting. Surely if its viable a major auto manufacturer will buy the rights to implement it.