The 2010 Chevrolet Impala is a four-door sedan that can achieve 29 mpg on the highway, which is impressive for a V6. The LTZ is powered by a 230 HP 3.9L FlexFuel V6 mated to a four-speed automatic transmission. The 2010 Chevrolet Impala standard safety features include side body/curtain airbags, daytime running lights, and Stabilitrak with full traction control. The Impala LTZ trim equipment list is nice as well, including power adjustable heated leather seating, Bose XM stereo with AUX outlet and Bluetooth connectivity, plus remote start. GM's warranty is 3-yr/36,000 mi and a 5-yr/100,000 mi.