What is the lowest CN value that any #1D or #2D fuel formulated for highway use can be legally sold at?

Name: What is the lowest CN value that any #1D or #2D fuel formulated for highway use can be legally sold at?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The lowest Cetane Number (CN) that any #1D or #2D fuel formulated for highway use can be legally sold at is 40. This is a standard to ensure proper ignition quality and performance in diesel engines.

What Is the Lowest CN Value That Any #1D or #2D