Random and probably silly question: Are there any benefits of using High Octane in grande? I've used high octane mostly, but was just wondering should i really do so? The biggest argument we hear for the usage of high octane is k millage achi aati ha. Well, thats is true to some extent. On motorways, yes farq parta ha. But in cities, i feel like its all about how you drive. So, other than this, is there any reason to use high octane? Mine is 63k driven, out of which atleast 45k is on high octane (no mixing).