2013 Buick Regal Gets Automatic for GS and Standard eAssist
Thus the 2013 Regal will get a new Aisin AF40 six-speed automatic with Driver Shift Control as a free option to the six-speed manual gearbox on the 270 horsepower turbocharged Regal GS sedan. This new box will provide you with the same performance, as it helps propel the car to 60mph in 6.7 seconds.
On the highway, this powerful engine does 27 mpg, while in the city you can expect to get 19 mpg according to Buick.
The other big change is that for the standard car, eAssist micro-hybrid systems are now standard. This basically means that the regular 2.4-liter base model is gone, but you should not be sad, because the eAssist Regal goes 36 mpg highway.