octane
Pump quality number
Octane is a hydrocarbon found in petroleum, but the word appears most often in discussions of fuel quality.
A fuel's octane rating measures its resistance to premature ignition—higher octane prevents engine knock in high-compression engines.
Premium gas has a higher octane than regular.
Figuratively, high-octane describes anything intense or high-energy: a high-octane thriller, high-octane coffee.
Refined petroleum vehicle fuel
- petrolMotor vehicle fuel
- dieselCompression-ignition fuel
- combustionExothermic reaction with oxygen
- ignitionStarting combustion process
engine · spark · burning · power · performance · acceleration · horsepower · turbo
Seven-carbon alkane
- hydrocarbonAll-carbon-and-hydrogen compound
- alkaneSaturated hydrocarbon series
- isomerSame formula, different shape
- moleculeBonded atomic group
carbon · hydrogen · organic · saturated · combustion · compound · petroleum · refining
Strength or force level
- powerEnergy transfer rate
- dynamismActive, energetic quality
- vigorActive physical strength
- adrenalineEmergency response hormone
excitement · thrilling · action · explosive · charged · amped · turbocharged · supercharged
gasoline
Refined petroleum vehicle fuel
- petrolMotor vehicle fuel
- dieselCompression-ignition fuel
- combustionExothermic reaction with oxygen
ignition · engine · spark · burning · power · performance · acceleration · horsepower · turbo · racing
heptane
Seven-carbon alkane
- hydrocarbonAll-carbon-and-hydrogen compound
- alkaneSaturated hydrocarbon series
- isomerSame formula, different shape
molecule · carbon · hydrogen · organic · saturated · combustion · compound · petroleum · refining · distillation
intensity
Strength or force level
adrenaline · excitement · thrilling · action · explosive · charged · amped · turbocharged · supercharged · revved
rating
Assigned evaluative score
midgrade · 87 · 91 · 93 · pump · grade · unleaded · super · plus
- chemicalschemicals, compounds, acids, reagents, solutions
- petroleumcrude oil, crude, petroleum, oil wells, oil fields
- fuelfuel, diesel, gasoline, petroleum, crude oil
- Gasolinegas, petrol, fuel, unleaded, premium
- organic compoundshydrocarbon, alcohol, alkane, ethane, propane
- eight prefixoctuple, octuplet, octahedron, octillion, octal
octanelow-octane
Lacking intensity or force
sluggishness · lethargy · dullness · tepidness · blandness
- high octaneIntensely energetic or powerful
- octane ratingFuel's anti-knock measurement
- low octaneLow-grade gasoline rating
- octane numberFuel combustion resistance rating
- regular octagonEight congruent sides and angles
octagon, octave, high-octane, octanes, octane rating, low-octane