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O/T--What octane for '07 Cad.with v8 Northstar eng

Discussion in 'Off Topic Threads' started by Dave Thoele, May 17, 2009.

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  1. Dave Thoele

    Dave Thoele TS Member

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    Jan 29, 1998
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    O/T--What octane for

    I have a STS-4. Have tried all the different octanes. The car seams to run
    well with any 87,89 & 92. NO "pinging" with 87. Any reason not to use 87?
    Thanks, Dave
     
  2. Remstar311

    Remstar311 Member

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    Sep 15, 2008
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    It might pull timing a little with the lower octane. High test is worth the extra 3.00 per fill up in my opinion. It just burns better, better gas mileage.
     
  3. grunt

    grunt Well-Known Member

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    Jan 29, 1998
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    Location:
    Thousand Oaks Ca
    on board computer will adjust for the lower octane. You may not get the best performence,But youll save a buck.
     
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