Is anyone else experiencing bad gas milage on a 06 Forester? on 2006 Subaru Forester

I started noticing my gas milage was getting really bad. Can anyone give me any help on this. For example: I filled the tank and now I'm on empty and the OD reads 181 miles. That sucks. I use to get 250 to 275. Is it the gas or my car?

Asked by for the 2006 Subaru Forester
Check it again.
1 more answer
I have same problem and mine is a 2007. Possible purge valve, or vent valve, or sensor reading bad, or smoke test fail