The current applicable O.N. rating range for Procedure D of D2700 specifies a range from 72 to 103.5 (without a decimal point). The lack of a decimal point for 72 is inconsistent with other parts of the test method. Precedence has been set by Subcommittee E to adjust the minimum Cetane Number level in D975 from 40 to 40. to avoid any ambiguity (D02 10-04 Item 33). The applicable O.N. rating range for Procedures D of D2700 should be updated to be from 72.0 to 103.5.
aviation rating; guide table; isooctane; knock intensity; motor octane number; n-heptane; spark-ignition engine fuel performance; toluene standardization fuel; Automotive engine fuels/oils; Knock characteristics; Motor octane number (MON); Octane number/rating;
Citing ASTM Standards
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