What does octane rating mean?
octane rating
Plural: octane ratings
Definition
A measure of how well gasoline resists premature ignition in an engine.
Example sentences
Which octane rating does the manual recommend for this engine?
Which octane rating does the manual recommend for this engine?
A higher octane rating costs extra, so let's check whether the car needs it.
A higher octane rating costs extra, so let's check whether the car needs it.