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What Octane Fuel

FlashGTA

SUSTAINING MEMBER
I just bought a 2008 G8 GT and I was wondering if I can run mid-grade or even 87 octane in it? I realize that running the lower octane fuel means less HP. Thanks for any answers!
This is my first post on the site!
 

melsg5

Staff member
SUSTAINING MEMBER
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According to your owner's manual the car will run on 87 octane but the knock sensor will reduce timing to prevent any engine knock. In everyday driving you will not notice any difference For maximum power you can run 91/93 octane.
 

FlashGTA

SUSTAINING MEMBER
Thank you very much for your reply! I thought that was the case but my cars owners manual did not come with the car. Thank you for taking the time to respond to my question!
 
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