Gas Mi

I have a 2006 Saturn iron 2, ecotec 2.2. I have a 13 gal fuel tank, and we have figured our gas mileage and we are getting 13 mi gal. The car runs perfect, can"t figure it out. No lights on either. Need help

How are you calculating your fuel economy? Do you leave your car idle for a while to let it warm up before you start driving it?

I get 33-34mpg hwy and 28-29mpg city in my 2007 Saturn Ion 2.2L/5spd. It has 179,xxx miles on it right now. If 13mpg is correct I would at least let a mechanic do a diagnostic check on the engine. Something doesn't sound right for sure.