Higher octane resists detonation (knocking). It’s required for engines with high compression ratios. Turbocharged engines are susceptible to detonation, so they’ll often require higher octane fuel.
My car has a 4-cylinder turbocharged engine. The manual says I can use standard, mid, or premium. The engine has a “knock sensor” which reduces power (basically by turning the turbo-charger down/off) if it senses detonation. If I use premium gas, the engine will use the turbo as much as possible, increasing gas mileage (according to the manual). The increased cost isn’t worth it to me.
Higher octane resists detonation (knocking). It’s required for engines with high compression ratios. Turbocharged engines are susceptible to detonation, so they’ll often require higher octane fuel.
My car has a 4-cylinder turbocharged engine. The manual says I can use standard, mid, or premium. The engine has a “knock sensor” which reduces power (basically by turning the turbo-charger down/off) if it senses detonation. If I use premium gas, the engine will use the turbo as much as possible, increasing gas mileage (according to the manual). The increased cost isn’t worth it to me.