RON stands for Research Octane Number and measures a fuel's resistance to knocking in spark-ignition engines. RON95 and RON97 are the two main types of petrol in Malaysia. RON97 has higher octane content, making combustion more efficient and emissions lower. It is better for the environment compared to RON95 due to more complete combustion and lower emissions and fuel consumption. Malaysia changed fuel standards from Euro 2M to Euro 4M to reduce exhaust emissions and improve air quality by lowering sulphur content in fuels.

1. RON95 vs RON97
JJ507
THERMODYNAMICS 2
 SIM KAH TIANG
 MUHAMMAD FUAD HELMY
 MUHAMMAD ADAM ZUHAIRI
01DKM13F2008
01MKM13F2001
01DKM12F2050

2. WHAT IS RON?
 RON stands for Research Octane Number
 A rating used to measure a fuels knocking resistance in
spark-ignition internal combustion engines.
 Knocking is what happens when parts or all of the air-
fuel mixture prematurely ignites before the flame from
the spark plug can reach it.
 This can be caused by ignition timing that is too early or
engine overheating.

3.  Basically RON is the grade of petrol capabilities against
abnormal combustion and generate energy at the
proper time during the burning process.
 Highest grade Ron does not guarantee a good efficiency
of the vehicle

4. WHAT IS EURO4M ?
 Euro 4M standard for RON97 petrol. Euro 4M is adapted
from the European Union’s (EU) strict rules on fuel
standards and specifications to manage fuel quality that
have impact on the environment.
 The main objective of the fuel standard upgrade is to
improve emissions for better air quality. This also has to
be done in unison with the availability of Euro 4
compliant vehicles.

5. WHY IS THERE A CHANGE FROM
EURO 2M TO EURO 4M?
 The Euro 4M implementation mandated by the
Malaysian government is to reduce exhaust emissions
 Lower levels of harmful exhaust emissions from motor
vehicles and thus, cleaner and better air quality
 The main difference between euro 2M and euro 4M
standard fuel is the sulphur content which was
significantly reduced from 500ppm to 50ppm.

6. DIFFERENCE BETWEEN
RON95 & RON97
RON95
 95% containing octane
and the remaining is
pentane
 Less efficient
combustion
 Fast combustion
 Price cheaper
 Low viscosity
 Suitable for carburator
 Plumbum
RON97
 97% containing octane
and the remaining is
pentane
 More efficient
combustion
 Slow combustion
 Expensive price
 High viscosity
 Suitable for injection
engine
 No plumbum

8. OCTANE PROPERTIES
 Octane is the ability to withstand the pressure in the
combustion chamber.
 The higher octane content, it's difficult to burn octane
in your vehicle engine

9. WHICH IS BEST CHOOSEN RON
TO ENVIRONMENT?

10.  Ron97 is the best choosen to environment
because:
 Complete combustion for engine
 High efficiency, lower petrol consumption
which is better for environment
 Lower exhaust emission (low carbon
dioxide/ monoxide)
 Does not contain plumbum which lower
probability of carbon created

11.  Sulphur in fuel results in vehicles emitting
harmful pollutants during the combustion
process.
 Presence hinders exhaust after-treatment
technologies from operating as they
should,
 Causing further harm to our health and
environment.

12. CONCLUSION