$3.229 at Costco in Phoenix. Mileage on the last tank was 52.1 MPG (2010 Prius) With the weather cooler here, no need for AC which has given me better mileage.

I've now got 28,500 miles on the car purchased in April 2010. My last vehicle, a 1991 Volvo got 18 MPG, I figure my savings was just under 1,000 gallons with the Prius. At today's gas prices, that's about $3,200 in savings.