What do the different octane values of gasoline mean?

Oct ane is a measure of the performance of gas oline in terms of its ability to resist engine knock . High er oct ane gas oline means that it is less at prevent ing engine knock , which can cause damage to the engine . \n \n G as oline with a higher oct ane rating is typically more expensive than gas oline with a lower oct ane rating . However , some vehicles require higher oct ane gas oline in order to run properly . It is important to check the owner ' s manual of your vehicle to determine the recommended oct ane rating for your specific make and model . \n \n In general , gas oline with an oct ane rating of 8 7 is suitable for most vehicles , but some high - per formance vehicles may require gas oline with an oct ane rating of 9 1 or higher . </s>