Buick has built a reputation as one of the auto industry's great innovators. This section of our site offers information about innovations currently available on the Regal LS and Regal GS. Full-Range Traction Control The standard full-range traction control on Regal GS helps sense drive-wheel slippage at any speed and automatically modulates the brakes and reduces engine torque until the driver regains control. OnStar® Regal's optional OnStar* provides you with an unparalleled level of safety, security, and information. At the touch of a button, an OnStar Advisor is available to contact emergency service providers and roadside assistance. In the event of a collision in which your airbags deploy, the OnStar system will automatically contact the OnStar Center where trained Advisors will immediately contact emergency assistance, if needed, and provide them with your Regal's location. *One-year OnStar Safety and Security Service Agreement standard on Century Limited and Special Edition Packages. For more information, call 1-800-OnStar-7. 3800 Series II Supercharged V6 For swift, on-demand acceleration, the 3800 Series II Supercharged V6 has 240 horsepower and 280 lb-ft torque. Standard on Regal GS, it offers an EPA estimated fuel economy of 18 mpg city, 27 mpg highway.