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Diesel, as kerosene, is easy to store since it does not evaporate as quickly as gasoline. If the gasoline must be stored for a longer period of time, then it has to be chemically treated with butylated hydroxytoluene (BHT) and moisture has to be avoided.
Therefore, diesel will evaporate much slowly than petrol, at normal (or room) temperatures, since diesel oil is much more heavier, containing approximately 10 atoms of carbon per molecule, while petrol is lighter and it contains 8 atoms of carbon per molecule.
The engine that uses diesel oil does not work in the same way as the one that uses petrol as fuel. Since the petrol evaporates so quicly, the petrol engine uses sparks to ignite the fuel, while diesel engine uses high temperature created by the strong compressive action.
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