[TOMS1SS]

Not sure on the exact tank spec but I know its about 9 gallons. 9 gallons at 1,000 miles is 111.11 MPG, great but still WAY off that 230 MPG BS GM was quoting a couple years back. Incidentally consider if your getting 40 MPG with a 12.5 gallon tank, each fill up at $4 dollars a gallon for regular is $50 dollars. So say you filled up once a week that is $2,600 dollars a years. With the Volt your paying $936 dollars a year for gas if your driving the same range as the sub-compact. A well optioned sub-compact comes out at about 18k usually, a Volt after goverment rebate is at minimum $33,500. So to make up the $15,500 dollar price difference you need have your Volt for just over 9 years. Don't get me wrong its still nice technology, but there is no way I would consider a Volt until it got in the mid 20s.