That's never a good thing for any car. I did come dangerously close to an empty tank once with the Boxster...never again, that was more sweating than I'd like to do in that car.
I know what you mean about not getting a lot of mileage from a tank. I've been getting a pretty consistent 20.5mpg for each tank, though I rarely let the car go beyond an indicated 1/4 tank before filling up. I've yet to see more than maybe 280 miles out of a tank regardless of how much driving is city and highway, but I also make sure I don't lug the engine in 5th going 65, so I know this plays a part.
I didn't buy the car for its gas sipping, though. Nobody was thinking about 7-speed manuals back then.
There are some of us who like to enjoy and have fun with driving. Other people just want a car that has four wheels with maybe as many working brakes, enough oil to not seize up, at least one working door handle/headlight/signal (brake lights are optional), and just enough cylinders to get them from point A to point B and they could care less if it has 15 inch black steelies and plastic body panels. Still othes are trying in vain to trade in their older and/or less efficient cars for something aenemic like a Honda Fit that could get better mileage and have a bigger tank for a car its size to be worth its price. They think they're doing themselves a favor even though they may end up filling up just as frequently as I do, albeit on regular vs. premium, but if your Fit is getting 30mpg on a 10.5 gallon tank (and that's still a big IF), you're getting just over 300 miles from it, no better than my Corolla with the 2 extra gallons it holds.
For those of us who want to enjoy driving (even when people are just getting in your way
), there's a reason to buy and enjoy a sports car like a Porsche.