Octane
The RON in samples of metal-free gasoline is shown in the figures below.
Most gasoline regular RON 93 samples were above the regulatory minimum of 93.
In 2018, in Namibia, premium gasoline was on average below the regulatory minimum of 95, while the other countries complied with the minimum.
Research octane number of gasoline regular RON 93 samples
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Source: SGS Worldwide Fuel Survey and Joint Venture, 2019
Research octane number of gasoline premium RON 95 samples
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Source: SGS Worldwide Fuel Survey and Joint Venture, 2019