Ok, so I've run the first tank of fuel through since doing the TSB fuel sender. Here are the results for mileage vs. indicated fuel level:

95 miles 3/4 tank
180 miles 1/2 tank
275 miles 1/4 tank (but then returned to almost 1/2 tank in 10 miles)
295 miles 1/4 tank (10 more miles and it went back to 1/4 from 1/2)
315 miles Warning light first came on. Level flucuated between light on and 1/4 tank during short distance driving.
335 miles E tank and vehicle died on the freeway. <img src="/forums/images/graemlins/lol.gif" alt="" />
Added two gallons of fuel and then drove to the gas station adding another 16.5 gallon for a total of 18.5 gallons. I guess the tank does hold 18.5 with the TSB. Mileage was 18.1 which is a bit low. I usually get over 19.

Hope this helps some one in diagnosing this TSB a bit.
Your mileage may vary. <img src="/forums/images/graemlins/smile.gif" alt="" />