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- Soon to be 2.5T CX-5
It's all about carbon atoms and how they line up. They're reactive, and the high octane is more combustible, allowing it to withstand more detonation and knock. Top that off with better cooling capacity, and you have a recipe for more power and efficiency. Think E85, you can make a s*** ton more power on E85 because it is highly resistant to detonation.