Is There 98-Octane Gasoline?
1 Answers
Gas stations all have 98-octane gasoline. Differences in gasoline grades: The octane rating varies. 98-octane gasoline is a mixture of 98% isooctane and 2% n-heptane, while 95-octane gasoline consists of 95% isooctane and 5% n-heptane. Performance of different gasoline grades: 98-octane gasoline offers higher anti-knock performance and power output, whereas 95-octane gasoline has average anti-knock combustion capability. Gasoline appears as a transparent, flammable liquid, refined from various petroleum-derived components such as straight-run gasoline, catalytic cracking gasoline, and catalytic reforming gasoline. After refining, it is blended with high-octane components and primarily used as fuel for spark-ignition internal combustion engines in automobiles.