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So every now and again when running on empty I put 20 liters of 94 in and have some good fun. I have noticed that I never get exhaust pops with 94.

What's up with that? (besides the obvious I'm not sending un-burnt fuel into the exhaust)
 

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Why would there be more to it than that? Higher octane is harder to ignite. I think that's the most basic level of it.
 
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