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I filled up 16 last night which is the most I've ever had to put it in it.
 

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At some point when I go on a road trip, I am going to focus on getting the maximum fuel economy possible. My goal is to get over 400 miles without filling up. I have gotten 25+ miles per gallon before in moderate traffic without using cruise control. I imagine if there was little traffic, a well broken-in ISF engine could easily get 26+ mpg driving at 70 mph on cruise control over flat roads. This would leave more than a gallon left in the tank at the 400 mile mark.
I never have the patience on road trips I'm at 80+ the whole way passing every car I can lol
 
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