Focus Fanatics - View Single Post - anyone using premium gas ?
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Old 12-10-2011, 02:38 PM   #54
flingwing1969
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Join Date: Nov 2011
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What I Drive: 2012 white platinum Forcus SEL 303A

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Quote:
Originally Posted by Dgc333 View Post
Actually on pg 354 it talks about some parts of the country regular gas is 85 octane and that the car will run better on premium than 85.

It does not say it will run better with premium than the 87 octane available to most of us.

This is the third time in this thread i have mentioned this.
And you are correct, but many don't want to be bothered by facts. The fact is, if your car knocks moderately or heavily under load, including when starting from a stop, then it may be due to fuel with a low octane rating. In this case, change stations and run 87 octane, or switch to mid-grade or premium fuel with an indicated octane rating above 87.
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