Ford Focus Forum, Ford Focus ST Forum - View Single Post - anyone using premium gas ?
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Old 01-24-2013, 09:45 PM   #24
A-to-the-J
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The average price difference in cost from regular to premium is $0.20/gal.
(i.e. Regular - $3.49/gal
Mid - $3.59/gal
Premium - $3.69/gal )
The savings on fuel from putting regular, rather than premium, is $2.40.

Honestly, I've been putting in Premium since I owned a Turbo Supra. My Lexus got premium as well. When I got the Focus, I was used to filling up on premium. Through previous threads on this, I'm pretty sure the ECU can take advantage of the higher octane.
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