Subaru Impreza Quiz
Starting and operating

Turbo models

In this manual: Starting and operating
Foreword — 1Warranties — 5How to use this Owner’s Manual — 5Vehicle symbols — 1Safety precautions when driving — 14Illustrated index — 7Function settings — 1Seat, seatbelt and SRS airbags — 75Keys and doors — 66Instruments and controls — 121Climate control — 42Audio — 168Interior equipment — 29Starting and operating — 111Driving tips — 31In case of emergency — 21Appearance care — 16Maintenance and service — 109Specifications — 21Consumer information and Reporting safety defects — 31
~1min read

Except STI

The engine is designed to operate using premium unleaded gasoline with an octane rating of 91 AKI (95 RON) or higher. If premium unleaded gasoline is not available, regular unleaded gasoline with an octane rating of 87 AKI (90 RON) or higher may be temporarily used. For optimum engine performance and driveability, it is required that you use premium grade unleaded gasoline.

If other gasoline (lower than 91 AKI (95 RON)) is used, knocking, reduced output and poor accelerator response will result.

STI

The engine is designed to operate at maximum performance using unleaded gasoline with an octane rating of 93 AKI (98 RON) or higher. If 93 AKI (98 RON) fuel is not readily available in your area, unleaded gasoline with an octane rating of 91 AKI (95 RON) may be used with no detriment to engine durability or driveability.

However, you may notice a slight decrease in maximum engine performance while using 91 AKI (95 RON) fuel.

Use of 91 AKI (95 RON) fuel will not affect your warranty coverage.

Test yourself

A quick Subaru Impreza quiz: every answer comes with an explanation and a link to the manual page.