I have a 2009 Pontiac G6 GT V6. Is it best to use 87 or 93 octane. Some have told me that it's probably designed to run on 87 so 93 could hurt the engine. Others swear by premium fuel no matter what. What is your opinion?
Thank you in advance.
have the same problem?
Sunday, December 13th, 2009 AT 6:09 PM