2nd 600 tank, this time with tonneau cover.I just filled up for the first time yesterday. Initial tank, 607 miles, remaining range ~55mi. Trip computer indicated 43.2mpg. Fill-up was 13.411 gallons(I don't top off, just stop at first click). My calc = 45.26 mpg, through its possible whoever put the initial gas in the truck did top it off. Driving was mixed.
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