RON vs. MON — What's the Difference?

A rating measuring gasoline's anti-knock properties under low stress.

Assesses gasoline's anti-knock properties under high stress.

Pertains to Research Octane Number.

Testing involves high temperatures and speeds.

Evaluates gasoline under low-speed conditions.

Also part of the Anti-Knock Index in the USA.

Commonly seen in European gasoline ratings.

Relevant for challenging driving scenarios.

Part of the Anti-Knock Index (AKI) in the USA.

A member of a traditionally Buddhist people inhabiting eastern Myanmar (Burma) and adjacent parts of Thailand.

(slang) heroin

The Mon-Khmer language of the Mon.

A Chadic language spoken in northern Nigeria

Man.

(historical) The former currency of Japan until 1870, before the yen.

The badge or emblem of a Japanese family, especially a family of the ancient feudal nobility; typically circular and consists of conventionalized forms from nature.

A colloquial means of address of man in places such as Jamaica and Shropshire in England.

(fandom) A creature in a video game, usually one which is captured, trained up and used in battles.

(fandom) A video game or anime in which catching and battling creatures is an important element.

The badge of a family, esp. of a family of the ancient feudal nobility. The most frequent form of the mon is circular, and it commonly consists of conventionalized forms from nature, flowers, birds, insects, the lightnings, the waves of the sea, or of geometrical symbolic figures; color is only a secondary character. It appears on lacquer and pottery, and embroidered on, or woven in, fabrics. The imperial chrysanthemum, the mon of the reigning family, is used as a national emblem. Formerly the mon of the shoguns of the Tokugawa family was so used.

The second day of the week; the first working day

A member of a Buddhist people living in Myanmar and adjacent parts of Thailand

The Mon-Khmer language spoken by the Mon people

Stands for Motor Octane Number.

RON stands for Research Octane Number.

MON measures gasoline's anti-knock properties under high-stress conditions, while RON does so under low-stress conditions.

They help determine gasoline's performance under different driving conditions.

AKI is the average of the RON and MON values.

MON is crucial for scenarios involving high speeds or towing, often resembling highway driving.

Yes, RON reflects gasoline performance under conditions similar to city driving.

Using a lower than recommended octane can lead to engine knocking, which might cause damage over time.

The two tests simulate different driving conditions, leading to different results for the same fuel.

They're determined using different test methods, with RON testing under low-stress and MON under high-stress conditions.

No, MON values are generally lower than RON values for the same gasoline.

Higher values indicate better resistance to knocking, but it's essential to use the fuel grade recommended for your vehicle.

RON is more indicative of everyday driving conditions, especially relevant in regions with predominantly urban driving.

Some countries label pumps with RON, MON, or AKI values. Check the pump or ask the fuel station.

While RON and MON are common, other regions might use different standards or a combination.

Generally, premium gasoline has higher octane values, but it's always best to check the specific ratings.