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225 V6 9:1 Compression Ratio, what grade gas?

Discussion in 'Early CJ5 and CJ6 Tech' started by scarecrow, Oct 10, 2008.

  1. Oct 10, 2008
    scarecrow

    scarecrow Member

    South Jersey
    Joined:
    Oct 9, 2007
    Messages:
    127
    I checked the engine code on mine it's 9 to 1 what grade of gas should I run:?
     
    scarecrow, Oct 10, 2008
    #1
  2. Oct 10, 2008
    Vanguard

    Vanguard Take Off! Staff Member

    Vista, CA USA
    Joined:
    Aug 30, 2006
    Messages:
    2,259
    Start with the cheap stuff, if it knocks move up to the next grade.
     
    Vanguard, Oct 10, 2008
    #2
  3. Oct 10, 2008
    lamar

    lamar Member

    greenville sc
    Joined:
    Jan 25, 2004
    Messages:
    327
    I use regular, 87 octane, and have no problems at all in my 67 225 v-6.
     
    lamar, Oct 10, 2008
    #3
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