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I think its more about how you drive - the "nut behind the wheel" than any bolt-on mods like filters. In my experience it just ain't that easy to get these high economy figures I'm afraid! You need to change habits that are often deeply set.
In any case manufacturers are not in the habit of using restrictive parts...
But yes the colder the intake the better; you get more oxygen in the cylinder.
Last edited by ecoxantia; 03-17-2009 at 07:22 AM..
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