I usually get just over 300 miles to a full tank and that is all town driving, its much better when I do long distances.
I have an 02 IS200 Aero sport with only 46000 miles on it, I think manual would be the better option :)
I'm having to sell mine as i now have a company car and we are saving for a house :( Gutted as i have always loved them and would love to keep it!