Clean Accident History! 20city/27hwy MPG! Talk about MPG! How tempting is this good-looking 2006 Nissan Sentra? This fantastic Sentra is the gas-saving car with everything you'd expect from Nissan, and THEN some. J.D. Power and Associates gave the 2006 Sentra 4.5 out of 5 Power Circles for Overall Initial Quality Design.