Fuel consumption Automobiles 40 Motor vehicles 13 Motors 9 Experimental design 8 Fuel systems 8 Motor fuels 5 Alternative fuel vehicles 4 Buses 4 Combustion 4 Energy consumption 4 Fluid dynamics 4 Fuel 4 Motorcycles 4 Performance 4 Testing 4 Environmental aspects 3 Hybrid electric vehicles 3 Pollution control devices 3 Trucks 3 Aerodynamics 2 Carburetors 2 Congresses 2 Data processing 2 Design and construction 2 Diesel motor 2 Fuel switching 2 Lubrication 2 Lubrication and lubricants 2 Modification 2