My 3.3 in my '97 gets around that number (high 14s with dips into the 15s mostly around town) with 166,000 on the clock and it's been very well maintained. The easiest way I've been able to increase gas mileage in mine is to install a "motor minder" type vacuum gauge. Really. I had one of those older ones hanging around that I used for doing diagnostics. I installed it on a temporary basis and it really helped increase my mileage. Try and keep that reasonably in the "green" range (10 to 17 Hg), not tough to do and still keep up with traffic (I don't like being a moving chicane to other drivers) and you can pick up an easy 2 mpg.