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Re: What does GM mean by "Premium Gas Recommended" on the 2.4L I4?
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Originally Posted by 327
Yep, the engines adjust to the octane level, it wont do damage at all, if you run a lower octane, like 89 instead of 91. 89 octane is cheaper than 87 and 89 anyway!
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Really why don't you explain to the class how the PCM will know the difference between 87 octane and 91 or 93 octane?So what you are saying is the PCM will recognize a lower octane fuel and adjust the timing etc. based on the octane?I really would like to hear this answer.The only thing the PCM will do is retard timing if it hears spark knock.Which i doubt would happen if you run 87 instead of premium in this engine.
Last edited by lynch mob : 10-25-2005 at 07:07 PM.
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