Honda Civic 2016 Manual page 33

Indonesian models
Unleaded petrol with a Research Octane
Number (RON) of 91 or higher is
recommended.
Is it possible to use unleaded petrol with a
Research Octane Number (RON) of 88 or
lower on this vehicle?
Pakistani 1.5 L engine models
Is it possible to use unleaded petrol with a
Research Octane Number (RON) of 87 or
higher on this vehicle?
32
Unleaded petrol with a research octane number
of 91 or higher is recommended.
Use of lower octane petrol can cause occasional
metallic knocking noise in the engine and will
result in decreased engine performance.
Use of petrol with a research octane less than
88 can lead to engine damage.
Your vehicle is designed to operate on
unleaded petrol with a research octane of 91 or
higher. If this octane grade is unavailable,
unleaded petrol with a research octane of 87 or
higher may be used temporarily.
The use of regular unleaded petrol can cause
metallic knocking noises in the engine and will
result in decreased engine performance. The
long-term use of regular-grade petrol can lead
to engine damage.