The Chrysler Pentastar engine family is a series of aluminium (die-cast cylinder block) dual overhead cam 24-valve gasoline V6 engines introduced for model-year 2011 Chrysler, Dodge and Jeep vehicles. The engine was initially named "Phoenix," but the name was changed before the official launch due to a trademark conflict; the Pentastar name is derived from the trademark of the former Chrysler Corporation, which dates back to 1963. The Pentastar was introduced at the 2009 New York Auto Show. The engine design allows the use of E85 or 87 octane fuel and features dual variable valve timing. Direct injection, forced induction, and cylinder deactivation options were engineered into the engine design but haven't been implemented from the factory, remaining "on the shelf" as of 2016.