Starting this fall, the 2011 Buick Regal will be E85 capable, marking the first time a direct-injection turbo motor can run on biofuel.
The E85 turbo engine was originally intended for the new Saab 9-5, but with the Swedish luxury division out of GM’s hands, the engine needed a new home. The base 2.4L four-cylinder will be E85 capable as well. The turbo engine in particular is expected to eliminate the fuel economy discrepancy that occurs when running on E85. Motors running on ethanol tend to see a 15 percent drop in fuel economy, however GM expects the gap to narrow below 10 percent on the turbo engine, with virtually no discrepancy in the future.