Would 87 or highers matter for CTS v6 3.6

4 messages, Last post on Jun 08, 2009 at 5:44 AM

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#1 of 4 Would 87 or highers matter for CTS v6 3.6 by doughunter May 21, 2009 (12:19 pm)
Hi, Would it be OK to use 87 gas for CTS v6 3.6 2007? Replies to this message: temj12 (May 22, 2009 8:45 pm) lash92ssei (Jun 08, 2009 5:44 am)
#2 of 4 Octane by pao May 21, 2009 (3:37 pm)
chcek the owners manual...the 09s take regular.....both the DI and Non DI engines
#3 of 4 Re: Would 87 or highers matter for CTS v6 3.6 [doughunter] by temj12 May 22, 2009 (8:45 pm)
Replying to: doughunter (May 21, 2009 12:19 pm) 87 is the recommended octane level. Don't waste your money on anything higher. This is my 2nd CTS; my previous one was your model. 87 is what they were to designed to run.
#4 of 4 Re: Would 87 or highers matter for CTS v6 3.6 [doughunter] by lash92ssei Jun 08, 2009 (5:44 am)
Replying to: doughunter (May 21, 2009 12:19 pm) Taken out of the owners manual- "If your vehicle has the 3.6L V6 engine, use regular unleaded gasoline with a posted octane of 87 or higher. However, for best performance and for trailer towing, you may wish to use middle grade or premium unleaded gasoline. If the octane is less than 87, you may get a heavy knocking noise when you drive. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible"