Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - anyone using premium gas ?
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Old 05-22-2012, 11:05 PM   #154
Kabigon
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Quote:
Originally Posted by Power Surge View Post
And how do you think the PCM knows what octane fuel is being used?

By the amount of spark knock it picks up.
Yes, but what is your point?
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