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21 Posts
Discussion Starter #1
I set my 2002 ford focus svt to run on unleaded fuel getting over
30 mpg on the highway. Runs just fine starts good.
 

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28 Posts
Aren't they all supposed to run on unleaded? Is he talking octane? Compression and combustion chamber design is what determines octane needs, not tuning for the most part...
 

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That Guy
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13,634 Posts
Life would suck so bad if someone was tuned for leaded fuel, that would be mildly inconvenient.
 

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Discussion Starter #19
Update i just did 30 mpg this last tank plus what i did
Was reset the computer after i did ny upgrades to
Have it learn my new setup. It runs smooth with no problems.
 
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