Ford Focus Forum, Ford Focus ST Forum - View Single Post - anyone using premium gas ?
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Old 05-22-2012, 08:04 PM   #129
Power Surge
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Join Date: May 2008
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Quote:
Originally Posted by Kabigon View Post

Two questions:

1) Do you think that the 5.0L engine is constantly "knocking or pinging" when using unleaded regular?

2) Why don't you believe that is possible for the PCM to adjust for different octane levels?
And how do you think the PCM knows what octane fuel is being used?

By the amount of spark knock it picks up.
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2012 Race Red 5-door SE, 18" Ti wheels, Ti headlights/fog bezels, 20% tint, debadged trunk
2002 Sonic Blue SVT - supercharged (sold)
2008 Vista Blue SE (gone)
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