Looking at your "MPG" link in your signature [
1997 Nissan Altima - Fillup history - MPGTune.Com - Track your car or truck gas mileage (MPG) online so you know real miles per gallon your vehicle gets ], your Altima has gotten around 26~27 mpg before. I has a lot to do with how the car is driven and the time of year. Cars always get worse gas mileage in the winter time due to cold weather and different fuel formulations.