My 98 has had the problem get worse over the past 6 months. At first it filled fast until the last two gallons. Now it has worked its way up to the last four gallons. Someone at work has a 99 that recently got new rear struts and helper springs for the suspension. It now sits almost two inches higher in the rear than my car does. I squeezed under my car with a half tank of gas and not jacking it up. Put a torpedo level on the filler tube where it runs horizontal for about a foot and a half to the tank. Sure enough, it is no longer running down hill into the tank. The bubble is just barely past the line closest to the tank. I think this might be the cause of these filler problems. I'm going to take a couple of blocks of wood with me the next time I need to fill up. I'll put them in front of the back tires and pull forward onto them to raise the back end up. That should be a good indicator if a sagging rear is the culprit.