【Q&A Question 069】June 28, 2016
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【Q&A Question 069】June 28, 2016: How are the commercial grades of gasoline and diesel determined? The answer key will be available after responding; scoring is based on addressing the key points. Gasoline according to octane rating ； Diesel is classified by freezing point.
Gasoline is classified according to its octane rating, which is the ratio of n-heptane to isobutane. Diesel is classified according to its freezing point, with six grades: -50, -35, -20, -10, 0, and 10.
Gasoline is classified according to its octane rating, while diesel is classified based on its freezing point
Gasoline is rated by octane rating, while diesel is rated by freezing point
The grade of gasoline is determined by its octane rating, which is divided into motor octane rating and research octane rating. The octane rating of 70# gasoline is determined using the motor method, while that of 90# gasoline is determined using the research method; for example, the research method octane rating of 90# automotive gasoline must be no less than 90. Diesel can be classified into different grades such as 10#, 0#, -10#, -20#, -35#, -50#, etc., based on its freezing point
Classified by research method octane number....
Gasoline grades are classified by research octane number； Diesel grades are classified by flash point.
Diesel is classified by flash point, while gasoline is classified by octane rating
Diesel is classified by flash point, while gasoline is classified by octane rating