Our tanks are souppse to hold 20 gallons, but our reserve is also high, so when your sensor is reading "------" miles, and you fill up to a full tank, only about 17 gallons would fit. I tried it today, got 17.6 gallons until no more would fit.
I'm getting 23.9mpg now. Started with 20-22 during the first 700 miles. Mostly open road driving, 60-70mph for now. Going to take it easy till the 3000 mile mark, meaning 4000rpm limit, keeping it below 80mph. and no pedal to the metal.
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