What kind of fuel does the 2009 Buick LaCrosse use?
The 2009 Buick LaCrosse could use either regular unleaded gasoline or premium unleaded gasoline, depending on the engine. The base engine could use regular, while the higher-performance V6 likely recommended premium for optimal performance. Always check the owner's manual for the specific fuel recommendation for your particular 2009 Buick LaCrosse.