What Do Gasoline Grades 92, 95, and 98 Mean?
1 Answers
Here are the meanings of the three gasoline grades: 1. 92-octane gasoline: Gasoline with an octane rating of 92 and 8% n-heptane. 2. 95-octane gasoline: Contains 95% isooctane and 3% n-heptane. 3. 98-octane gasoline: Gasoline with an octane rating equivalent to a mixture of 98% isooctane and 2% n-heptane. The gasoline grade is the ratio of the actual anti-knock performance of gasoline to that of standard gasoline. The higher the grade, the stronger the anti-knock performance. Standard gasoline is composed of isooctane and n-heptane. Higher grades are not necessarily better; the appropriate gasoline grade should be selected based on the engine's compression ratio.