Diesel has a shelf life. Generally, the shelf life of unsealed diesel oil is four years, diesel oil storage for a long time, the combustion rate will slowly decline, in the process of diesel refining, oil products by hydrocarbon mixture, mainly containing 918 carbon prochain alkyl, naphthenes or aromatic hydrocarbons, physical characteristics in gasoline heavy oil, boiling point 170℃-390℃ between, specific gravity 0.82~0.845kg/l.
However, from the actual situation, refined oil generally directly into the market, will not be stored for three months or more.
If the storage contact with water, copper, zinc and other metals, will accelerate the decomposition. Diesel has a shelf life of at least 12 months at 20°C, and the oil contains many unstable substances and volatile components, which are prone to deterioration.
From the point of view of inspection sample retention, the retention time of general diesel sample is 3 months, indicating that diesel product quality is guaranteed in at least 3 months (in line with national standards).