abstract:The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water. If its API gravity is greater than 10, it is lighter and floats on water; if less than 10, it is heavier and sinks.
The numericalresultcalculated by theformula forestimatingthe cetane number of distillatefuels from AmericanPetroleum Institute (API) gravityandmidboiling point.