&gt; While smaller turbocharged engines have improved EPA scores, in many of our road tests, we haven&#x27;t seen such radical mileage swings compared with naturally aspirated engines. Ford&#x27;s EcoBoost 2.7-liter and 3.5-liter V-6 engines, for example, return mileage on par with Chevy&#x27;s larger 6.2-liter V-8.<p>Are these really standard fare in the US? In Europe the norm is more like 1.0-1.6 liter turbo engines in new cars.