Related by context. Frequent words. (Click for all words.) 59 CAFE standards 53 mpg 51 Average Fuel 50 automakers 50 tailpipe emissions 48 EVs 48 Fuel Economy 48 carmakers 46 Fuel Efficiency 46 diesels 45 Automakers 44 flex fuel 44 PZEV 44 CO2 emission 43 CAFE 43 emission 43 Chevrolet Volt 43 automaker 43 greenhouse gas emission 43 curbing greenhouse gases 42 gas guzzler 42 Fortwo 42 HEVs 42 drag coefficient 42 NHTSA 42 aerodynamic drag 42 V 8s 42 Motor Vehicle Safety 42 mileage 42 homologation 42 Pavley 42 #mpg [002] 42 gas guzzling SUV 42 Chevy Volt 41 exhaust emissions 41 midsize SUV 41 Flex Fuel 41 Smart fortwo 41 SUVs 41 CUVs 41 #.#L engine 41 PHEVs 41 GHG reduction 41 speed automatic transmissions 41 midsize sedans 41 midsize SUVs 41 Escape Hybrid 41 efficiency 41 kpl 41 l/# km 41 PHEV 40 midsize sedan 40 zero emission 40 Chevrolet Volt plug 40 V6 engines 40 Board CARB 40 Fisker Karma 40 #g/km [001] 40 alternative fuels 40 diesel engines 40 Volt 40 powertrain warranty 40 emissions 40 scrappage 40 BlueMotion 40 greenhouse gas emission reductions 40 hybrids 40 subcompacts 40 EcoBoost engine 40 carbon dioxide emission 40 PAYGO 40 emission norms 39 Krafcik 39 technologically feasible 39 drivability 39 diesel 39 electrically driven 39 diesel powered 39 global warming gases 39 gas guzzlers 39 Smart Fortwo 39 General Motors Corp. 39 hybrid electric 39 CTS V 39 Smart ForTwo 39 electric hybrids 39 Waxman Markey 39 Cruze Eco 39 reducing CO2 emissions 39 Casesa 39 Automaker 39 cabrio 39 Fusion Hybrid 39 tailpipe 39 Automotive Engineers 39 SRT8 39 CO2 emissions 39 #-# km h 39 Explorer SUV 39 powertrain 39 greenhouse emissions