Here's another data point for '07 RT Tank volume.
Low Fuel light approx. 50 miles to empty
53.7 miles past 0 to empty fill up 7.08 gallons (no rubber plug in tank)
315 miles on the trip meter
That's over 2 gallons remaining when the light comes on!
This was to be a functional test, but never actually ran out of gas. Couldn't pass up that last gas station!