Ships are powered by internal combustion engines, what is the difference between marine fuel oil and the diesel fuel used in automobile internal combustion engines?

Oh, my answer is a little different from the kind brother upstairs.

Marine fuel oil and automotive diesel fuel, essentially the same, the two oils of the family composition is basically the same, are made up of alkanes, cycloalkanes, aromatic hydrocarbons. The difference is mainly the proportion of components is different, and the molecular weight of marine fuel oil is larger, at the same time, marine oil also contains part of the gum and asphaltene.

As for the calorific value, upstairs brother's statement is not accurate, it should be the mass calorific value of gasoline is greater than the mass calorific value of diesel fuel, while the volume calorific value of gasoline is not seen than the diesel fuel is high. Powerful machinery with diesel is due to the high thermal efficiency of the diesel engine, and a large amount of diesel fuel injected into the cylinder per unit of time.

Thanks, that's all, sorry for the fallacy.