Must be something near this:
"Dimethyl Ether (DME) — A synthetic diesel fuel derived from natural gas, an excellent candidate for direct-injection engines. DME contains no sulfur and burns more cleanly than conventional diesel fuel, so it produces fewer particulates. It behaves much like propane, and its cetane number is 55-60, up to 20% better than modern diesel fuel. However, the viscosity of DME is 10 times less than that of diesel fuel, which makes it difficult to find pumps and valves that will not overheat or leak. Also, the entire fuel system must be kept under a pressure of at least 5 bars at room temperature to keep the DME liquid until it is injected."
And this from Shell...if anyone was curious as I.
"This advanced fuel is designed to help the latest generation of diesel engines to continuously deliver power. In many countries Shell V-Power Diesel contains the same exclusive synthetic GTL(Gas to Liquids) Fuel technology used in the ALMS race fuel. Shell has led the introduction of this innovative fuel technology and is already supplying GTL Fuel as the special ingredient at the heart of Shell V-Power Diesel through some 4,000 Shell retail sites across Europe."