LittleJerrySeinfeld
Active Member
- Joined
- Dec 4, 2014
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- 7
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- Location
- Minneapolis
- Vehicle(s)
- EcoBoost Premium
- Thread starter
- #1
Is there a difference in mileage between 87 octane and 93 octane? And if i have 87 octane in my tank do I have to run it empty before putting higher octane in it?
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