Someone told me that it doesn't really matter what you use but I have always used 91 octane. What do you guys use

 

Someone told me you don't need 6 threads to ask a question.

If you search you'll find that following manual, and using 91, is the best and recommended practice to avoid engine knock and future potential additional engine issues.

 

Please don't ever post the same question multiple times like this again and make me have to close them all.

Silly question. Read the manual. Or search the forum as this has been discussed extensively multiple times.