A key indicator of diesel is the Cetane Number which is analogous to the octane rating for petrol. Cetane is a measure of the ignition delay, that is, the time between injection into the cylinder and the moment of auto-ignition. This is most significant in relation to low-temperature startability, warm-up, and smooth, even combustion. Distillates with a higher cetane rating show increased power and superior performance characteristics. Ideal diesel will have a high proportion of hydrocarbon chains that are 16 carbon atoms long. Hydrocarbon chains of length C16 are known as hexadecane which is the proper chemical name for cetane. Thermo Fuel produced diesel has a cetane number in the range of 57, similar to or higher conventional diesel, which averages 51-54.