Test Method for Calculated Cetane Index by Four Variable Equation

3 The test method Calculated Cetane Index by Four Variable Equation is particularly applicable to Grade 1-D and Grade 2-D diesel fuel oils containing straight-run and cracked stocks, and blends of the two. It can also be used for heavier fuels with 90 % recovery points less than 382 C and for fuels containing non-petroleum derivatives fix m tar sands and oil shale. 

4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 

D 613 Test Method for Cetane Number of Diesel Fuel Oil  

D 1298 Test Method for Density, Relative E)ensity (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method  

D 40S2 Test Method for Denaty and Relative Denaty of Liquids by Digital Density Meter  

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