Forum Discussion
GrumpyandGrandm
Jun 18, 2013Explorer
n7bsn wrote:
Follow the manual... I have since my first V10 in 1999. I tried higher octane and could not detect any difference in performance or milage
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I totally agree, when we had our 2001 E-450 I did the same thing and the only thing that improved was the gas stations profit.
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