Had been smelling gas recently at start up, but couldn't find a leak. I replaced the fuel pressure regulator and the fuel filter about 2 weeks ago. This stopped the gas odor. Since then, my gas mileage is way up. For instance, when I pulled off the highway this afternoon, it was averaging 31.9MPG. I had been averaging around 25 recently, which was down from what it was a few years ago. I am curious if anyone knows which item increased the gas mileage, the fuel pressure regulator, or the fuel filter? My guess would be the regulator. It has 155,000 miles on it.