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Colloquial term for 'gasoline', a liquid petrochemical refined from crude oil and used in internal combustion engines as fuel.

5 votes

What are the benefits of premium (high octane) petrol?

As far as I know premium fuel is (or was) better suited for engines with higher compression ratios (10:1 or more), since lower octane fuel is more likely to combust before the sparkplug fires.
Kjartan Þór Kjartansson's user avatar