Why is the octane rating greater than 100?
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For some components such as MTBE, the research octane number is 117 while the motor octane number is 101. Moreover, the definition of octane number, which is based on the volume ratio of n-heptane to isooctane on a scale of 0-100, does not align with these values. How should this be understood?
Other hydrocarbons have different octane numbers
It’s similar to how the freezing and boiling points of water are 0–100°C, but these two temperatures for other substances are not necessarily 0–100℃
That’s a more appropriate way to describe it! It is itself a comparative value, and there is no rule stating that the maximum value must be 100; therefore, any value, large or small, is considered normal!
The octane rating of isooctane is set at 100, and there are many substances with an octane rating higher than that of isooctane
What is the current proportion of MTBE added to the gasoline produced for sale?
We in the operational positions don’t come into contact with these on a regular basis
Because using octane as fuel for gasoline engines can also cause knocking. An octane rating of 100 indicates that this fuel has the same anti-knock properties as octane. If a certain fuel has better anti-knock properties than octane, its octane rating is greater than 100.
The octane rating of isopentane oil is specified as 100, for comparison with other substances.