Not sure what this means but here it goes. On my last tank (2 weeks maybe) my mpg dropped from 40-45 to 34-36. I've been using the Conoco that's on my way to work and also happened to be the cheapest in town (1.69-1.79/gal the last couple months). I thought maybe it was bad gas so I figured I'd try someone else next tank. I also looked at my maintenance records and noticed it has been 15,000 since an air filter change so I bought a new one. When I installed it I noticed what looked like mouse/rat droppings on the intake side of the filter. Now I'm thinking oh hell maybe I have a dead rat stuck in the intake duct which is messing with mpg . . . but I'm still gonna wait til next tank. Today I go to fill up on that "next tank" and the fuel nozzle immediately clicks off whenever I squeeze the trigger all the way. I finally found a slow speed that it would go in. I typically put in 7 gal on a fill up (from one blip on the fuel gauge) but this time I got up to 8+ and so I pull the nozzle out and gas comes gurgling out and spilled all over the ground. It looked like the gas inlet was burping over and over. So my question to y'all is "WTMF'ingH" is going on there? Car runs perfectly fine.