Candidate Fuel: A test fuel being considered for comparison with another fuel.
Candidate group: A pre-specified number of engines/vehicles that use treated fuel as comparison to a group using untreated fuel.
CARB: California Air Resources Board
CCDET: California Council on Diesel Education and Technology.
Centrifugal Pump: A pump designed with a fixed impeller rotating on a fixed shaft enclosed in a casing which creates pressure on the liquid moving it through the casing.
Cetane: A colorless oily hydrocarbon C16H34 found in petroleum.
Cetane Number: A measure of the ignition value of diesel fuel that represents the percentage by volume of cetane in a mixture of liquid methylnaphthalene that gives the same ignition lag as the oil being tested — called also cetane rating.
China Lake: California location of the United States Naval Air Weapons Station (formerly the Naval Weapons Testing Laboratory).
CO: Carbon Monoxide. CO is a colorless, odorless, and poisonous gas produced by incomplete combustion of carbon in fuels.
CO2: Carbon Dioxide. A colorless, odorless, and incombustible gas formed during respiration, combustion, and organic decomposition. Under normal conditions, it is stable, inert, and nontoxic.
Combustion Improver: A technology (Viscon) that produces a more complete fuel combustion.
Compression Ignition Engine: An engine design where mixed fuel and air are compressed to the point of auto-ignition; e.g., Diesel Engine.
Control Group: The non-treatment part of an experiment where the results are compared with the treatment experiment.