Quote:
Originally posted by leftturn109
Octane has eight carbons chained together.
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You are correct about that, but I don't believe that automotive fuel actually IS octane...the octane rating, as I understand it, just reflects a percentage rating of how resistant a fuel is to compression ignition, compared to pure octane...ie, 100 octane fuel would behave like octane, 90 octane would detonate at 90% of the pressure octane would, etc etc. It might not be an exact pressure percentage, but I am pretty sure that it is just using octane as a reference point.