high-octane gasoline; premium gasoline
Refers to gasoline with a high octane rating, typically used for high-performance engines. In Japan, it is commonly called ハイオク for short.
This car's engine will knock if you don't use high-octane gasoline.
High-octane gasoline is more expensive than regular.
Variant with interpunct; less common but seen in some contexts.
Loanword from English 'high-octane gasoline'.