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08-22-2017, 08:16 PM | #1 | |
AF Newbie
Join Date: Jul 2009
Location: wichita, Kansas
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question on octine
deville has been running premium owners manual says unleaded regular. can I change to regular?
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08-23-2017, 07:08 AM | #2 | |
Your worst nightmare
Join Date: Oct 2004
Location: Smithfield, Pennsylvania
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Re: question on octine
Yep. If you've been putting premium in then its been nothing but a waste of money. You only need to run enough octane not to knock. Any more than that is a waste and can actually harm fuel mileage.
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