The Lexus ES 350 is one of the top selling luxury sedans in the country. Why? We tested it to see if it lives up to the sales hype. Under the Hood The 2015 Lexus ES 350 features a standard 3.5-liter 6-cylinder engine that produces a respectable 268 horsepower and 248 lb-ft of torque. That power runs through a 6-speed