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Iran

I run 89 in the Ecoboost Ranger but the mpg is better than it is with 87 so it doesn't cost any more to use overall.
MPG with 93 is no better than with 89.
I need to play with this, averaged 22 MPG on the cross-country trip with the 5.0 Coyote just burning 87 and cruising 9 MPH above the posted speed limit. Next couple of tanks I'll try 89 and see if it makes a difference.
 
I need to play with this, averaged 22 MPG on the cross-country trip with the 5.0 Coyote just burning 87 and cruising 9 MPH above the posted speed limit. Next couple of tanks I'll try 89 and see if it makes a difference.
I reset the mpg display at every fill-up. I average 18.5-20 mpg in mixed driving.
 
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