TwinTurbo.NET: Nissan 300ZX forum - Hey Alan, The gas is 91 octane to start with but
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Subject Hey Alan, The gas is 91 octane to start with but
     
Posted by SirpriZ on December 04, 2005 at 10:33 PM
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In Reply To Is there any way to be sure I'm getting 91 octane?? posted by sorka on December 04, 2005 at 08:02 PM
     
Message (especially the pee pee in Ca.) degrades rather quickly. I don't have an explanation on a molecular level, but the gas looses octane the longer it sits. So, you may end up with fuel that is a point or two off (enough to cause detonation). I don't know how the Federal inspectors deal with that. That's actually what our detonation sensor is for, it actually is a "bad gas sensor", as it goes out of the loop after (around) 3,000 RPM or when in open loop operation....just an aside. Anyway that's all I know, take care, Mark

     
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