Chevron Malaysia has prepared the following answers to Frequently Asked Questions (FAQs) to help motorists understand the subject and know which petrol grade to choose.
Refer to the Owner's Manual (above) or the fuel filler lid label (below) to find out what RON is the minimum suitable for the car's engine
What is RON?
RON stands for Research Octane Number and is a rating of petrol. It determines a petrol’s anti-knock quality or resistance to pre-ignition or detonation as it burns in the combustion chamber. Knocking is an abnormal condition during combustion and should be prevented as it can be damaging to the engine.
What petrol is currently sold in Malaysia?
Stations in Malaysia currently offer petrol products of RON92 (at Caltex stations, also known as Silver with Techron) and RON97 (Gold with Techron at Caltex stations). At the moment, vehicles which require RON95 or less use RON97.
What vehicle types are able to use RON95?
Most vehicles with petrol engines can use RON95. However, it is best to refer to the Owner’s Manual for the recommendation by the manufacturer of the vehicle model or, in some cases, check the label which is stuck on the back of the fuel filler lid which will indicate the minimum octane required.
Will an engine which has been running on RON92 be damaged when it is switched to RON95?
The main difference between RON92 and RON95 is the octane rating and using a higher RON will not harm the engine. However, it is best to choose the most suitable grade for your engine and this can be done by referring to the Owner’s Manual for the recommendation by the manufacturer of the vehicle model or, in some cases, check the label which is stuck on the back of the fuel filler lid which will indicate the minimum octane required.
Will an engine which has been running on RON97 be damaged when it is switched to RON95?
Using a petrol with a lower RON may or may not cause harm to the engine. If in doubt, it is best to refer to the Owner’s Manual for the recommendation by the manufacturer of the vehicle model or, in some cases, check the label which is stuck on the back of the fuel filler lid which will indicate the minimum octane required.
Should I empty the fuel tank before refueling with RON95?
This depends on the amount of petrol remaining in the tank. The less the amount, the faster the benefits of RON95 can be derived.
What will the effect on performance be if petrol of a different RON is mixed?
It is not recommended to mix petrols with different RON ratings as this might result in sub-optimal performance. For example, if the mixture contains a lower-than-recommended RON, then knocking might occur, accompanied by loss of power.
Should I always select the highest RON grade available for my vehicle?
The highest RON rating available may not necessarily be the best for your engine. The best thing is to refer to the Owner’s Manual for the recommendation by the manufacturer of the vehicle model or, in some cases, check the label which is stuck on the back of the fuel filler lid which will indicate the minimum octane required.
Does a higher RON rating indicate a more environment-friendly fuel? How about greater power?
The true difference between grades of petrol lies in an engine’s requirement. There is no guarantee of greater power or a more environment-friendly option as the number gets higher. This infers that cars using fuel with RON greater than what their engine requires may not be necessarily gaining better performance than if they adhered to the recommendations the manufacturer of the car has made.
What is the impact of RON95 usage on the environment?
At present, there is insufficient data to adequately prove that a higher or lower RON grade poses an environmental issue.
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To know more about Caltex with Techron, http://paultan.org/2009/06/17/chevron-explains-ron95-octane-fuel/ |
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