hey, you asked.
when I go a full tank, I almost always fill up about 22gallons (almost at E with three gallons left) and always had around 350miles. likewise I know where I'm usually at around the 1/4, 1/2, and 3/4 marks. I monitor my mpg and this has been pretty consistent (15-16mpg combined 60/40 city/highway). but I probably won't even let this tank get past halfway as I'm anxious to fill up and see what kind of gains I've had.