D2 diesel fuel is the second distillate of crude oil. Ultra-low
sulfur grades of D2, such as GOST *****2, with a reduce sulfur
content to a maximum of 0.*2 percent and reduce sulfur pollution
emissions.
Diesel fuel is often used in diesel engines. Diesel engines or
compression ignition engines, rely on the temperature increase of
compression, rather than on spark plugs, to achieve reliable
ignition timing and combustion efficiency.
As a result of their inherently higher compression ratio for a
given power output, diesel engines are more fuel efficient than
spark ignition engines. Compared with spark ignition automotive
engines, diesel engines weigh more, generate more vibration and
produce greater particulate or soot emissions. Diesel engines can
also produce a particularly carcinogenic type of hydrocarbon
pollutant known as polycyclic aromatic hydrocarbons (PAHs), which
are generated during the diesel combustion
process.
The cetane index is a measure of the autoignition quality of a
diesel fuel, with higher numbers meaning that the engine is easier
to start in cold weather.
