[philman_36]

Do you not know how to do a simple search on the Internet?

What Does Octane Do In Gasoline? Octane Ratings
The octane rating of gasoline essentially tells you how much the air-fuel mixture can be compressed before it will spontaneously ignite. Gasoline with an optimal octane rating performs best in an engine designed to run on that octane level.

[philman_36]

Using higher-octane gasoline than your engine is designed to utilize is only wasting your money.