What are octane and cetane numbers?

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Could someone explain to me what they are? I was able to wrap my head around octane. It does make sense, but am a bit confused on Cetane. Would appreciate your reply.

In: Chemistry

Anonymous 0 Comments

A high cetane rating represents a fuel that can readily ignite and perform better in a diesel engine. High octane ratings represent a fuel that can resist auto-ignition and have less tendency to knock in a gasoline engine.

https://petroleumservicecompany.com/blog/the-difference-between-cetane-and-octane/