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Old 11-05-2011, 11:50 AM
erm
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The winter blend fuel may be the culprit here.

I did an intake, exhaust and programmer and gained almost 4 MPG on the highway. Anything you can do to make the engine more efficient (better air in, better air out, optimal fuel delivery & timing settings, smooth driving techniques, etc...) will all help to improve fuel mileage.
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