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Thread: Premium Fuel

  1. #11
    Sr. Apprentice
    Join Date
    Feb 2010
    Avondale, AZ


    Follow what the manufacturer states. The higher octane fuel is set in relation to the compression ratio. The manufacturer knows what they're talking about...

  2. #12


    Quote Originally Posted by duck44 View Post
    My 6.2 gas cover "recommends" premium gas. What will happen if I do not use premium is it more for performance or longevity of the engine?
    i had knew a guy that had a mitsubushi 4dr montero and was to run premium in it but always run 87 octane he kept messing up his o2 sensors .. but that was a mitsu .. not a amerian engine you could try the 89 octane

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