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I recently picked up a used 2013 F-150 with the 3.5L ecoboost engine and was wondering what others are using in terms of fuel octane. The manual says it's designed to run on 87 but you will notice a performance gain using premium. This is a highly debated topic over at the F150 site so I was wondering what any of your experiences are. Some recommended 87 as a daily driver and 91 when long distance towing. Any of you guys run this engine and notice a difference on different octanes?
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