Ron 95 and Ron 97 for Malaysian drivers

• Author: zzoom
• Date: Aug 28,2009

Rumors on petrol price for RON 97 will increase from RM1.80/liter to RM 2.00/liter with effect on 1Sep’09.

This RON 97 is common use for majority of our cars.At the same time, another new petrol grade will be introduced which is RON 95 (with cheaper price, RM1.75/liter).

RON–> Research Octane Number

Wiki notes:

Octane rating of a spark ignition engine fuel is the detonation resistance (anti-knock rating) compared to a mixture of iso-octane (2,2,4-trimethylpentane, an isomer of octane) and n-heptane. By definition, iso-octane is assigned an octane rating of 100, and heptane is assigned an octane rating of zero. An 87-octane gasoline, for example, possesses the same anti-knock rating of a mixture of 87% (by volume) iso-octane, and 13% (by volume) n-heptane. This does not mean, however, that the gasoline actually contains these hydrocarbons in these actual proportions. It simply means that it has the same detonation resistance properties as the described ’standard’ defined mixture.

Octane number refers to the gasoline ability to withstand auto ignition inside the engine. Simply said, RON97 is harder to ignite compared to RON95.

I believe some of us might switch from RON97 to RON95 due to the cheaper price.BUT, you are advised to check out your vehicle fuel requirement, to ensure compatibility and usability.

The effect of using lower RON then the requirement: KNOCKING ( poor performance of your vehicle)

There are 3 ways to check:-

1. From your vehicle guide book.

2. Min Octane Number Rating at the back of the fuel lid cover

3. Ask the car manufacturer.

Or, refer to the reference table.

From the table listed, Malaysia cars like Proton & Perodua cars are most common. Others like Japanese Honda, Nissan and Mitsubishi are also listed here.

Note: The reference table is just for guide purposes only, for confirmation please contact your nearest car manufacture service center.

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