Fuel economy in automobiles, refers to the fuel efficiency relationship between distance traveled by an automobile and the amount of fuel consumed.
Fuel economy is a measure of how much fuel an aircraft needs to operate, and it can be expressed in several ways, for example by the liters of fuel consumed per passenger per kilometer.
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3B2 — The 3B20, found in the 2003 Mitsubishi i, uses a 660 cc DOHC with the company's MIVEC variable valve timing and an intercooled turbocharger, and was designed with the aim of exceeding Japan's 2010 fuel economy requirements.
Research by Car and Driver conducted using a selection of differently sized alloy wheels from 16" to 19" all outfitted with the same make and model of tires showed that both 0-60 times and fuel economy were suffering with larger wheels.
Engine performance is looking for maximum displacement (bigger, more power), while fuel economy is looking for a smaller displacement engine (ex: 1.4 L vs. 5.4 L).
The Fuel Economy Reform Act was a bill (S. 3694 in the 109th United States Congress and S. 767 and S. 768 in the 110th United States Congress) sponsored by seven Democrats and four Republicans including Barack Obama and Richard Lugar.
Modifying the accessory drive system can increase fuel economy and performance to some extent.
A smaller 1,492 cc engine was fitted to deliver better fuel economy than its Hyundai and Kia competitors, however, sales did not recover with only 992 cars sold in two years.
However, real-world test by Popular Mechanics showed significantly better fuel economy than EPA estimated MPG.
The Union of Concerned Scientists (UCS) in its 2011 Hybrid Scorecard ranked the Lexus CT 200h, together with the Lincoln MKZ Hybrid, as the top luxury hybrid models in the scorecard’s environmental improvement category, an achievement the UCS attributed to their relatively small gasoline engines, as both carmakers downsized these vehicles’ engines from six to four cylinders to maximize fuel economy.