Gasoline is produced by refining various gasoline components, such as straight-run gasoline, catalytic cracking gasoline, and catalytic reforming gasoline, and then blending them with high-octane components. It is primarily used as fuel for spark-ignition internal combustion engines in automobiles. The density of gasoline may vary slightly depending on the season and climate.
1. What is the difference between gasoline octane ratings?
The octane rating refers to the volume percentage of isooctane in the fuel. A higher number indicates better anti-knock properties. The required octane rating for your vehicle is indicated on the back of your fuel filler cap.
2. What is the relationship between vehicle compression ratio and gasoline octane rating?
When you buy a car, the compression ratio will always be listed in the manufacturer’s manual. Many people believe that a higher compression ratio requires a higher octane gasoline. However, with current engine technology, the compression ratio of a car has little to do with the octane rating of the gasoline used. Therefore, simply follow the manufacturer’s recommendations for the octane rating of your vehicle; there will be no problem.
