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Hybrid systems use regenerative braking to capture kinetic energy instead of allowing that energy to escape unused as heat. They also pause engine combustion when the car is stopped, in order to save fuel.
Understanding the types of hybrid systems, Environmental Protection Agency (EPA) fuel economy ratings, and EPA emissions ratings is integral to choosing a hybrid car or SUV.
Measuring Vehicle Efficiency
Hybrid Vehicles
While new EPA testing methods better account for actual city and highway driving conditions, your fuel economy may vary based on factors such as aggressive driving, maintenance habits, use of air conditioning, and weather.
(.55 x city mpg) + (.45 x hwy mpg) = EPA estimated combined mpg
Nissan Altima Hybrid: 9.5Honda Civic Hybrid: 9Toyota Prius: 8Toyota Camry Hybrid: 8Saturn Aura Green Line Hybrid: 8Lexus GS 450h / LS 600h L: 8
Fuel economy is one of the most popular ways of measuring the efficiency of hybrid vehicles. Initially, vehicle manufacturers test pre-production prototypes, in controlled laboratory conditions, and report the results to the EPA. The EPA reviews the results and confirms 10 to 15 percent via their own tests at the National Vehicles and Fuel Emissions Laboratory.
2008 Hybrid Cars Ranked by Emissions Ratings (According to the Union of Concerned Scientists)
According to Cars.com [link widoczny dla zalogowanych], there are two types of hybrid systems available: the kind in which the engine is dominant, as with Honda and Saturn, and the kind where the electric motor is dominant, as with Toyota, Ford [link widoczny dla zalogowanych], Mercury and Lexus.
Emissions rating is another environmental consideration when purchasing a vehicle. According to the EPA, hydrocarbons and oxides of nitrogen combine with sunlight and form smog, which can irritate the lungs and eyes. While catalytic converters, exhaust gas recirculation and electronic fuel controls reduce pollution, emission levels still vary among vehicles. A score of 0 - 10 describes a vehicle's emissions rating. A score of 10 is best and 0 is worst.
2008 Hybrid Cars Ranked by Fuel Economy Toyota Prius: 48 city, 45 hwy, 46 combined mpgHonda Civic Hybrid: 40 city, 45 hwy, 42 combined mpgToyota Camry Hybrid: 43 city, 37 hwy, 40 combined mpgNissan Altima Hybrid: 35 city, 33 hwy, 34 combined mpgSaturn Aura Green Line Hybrid: 24 city, 32 hwy, 27 combined mpgLexus GS 450h: 22 city, 25 hwy, 23 combined mpgLexus LS 600h L: 20 city, 22 hwy, 21 combined2008 Hybrid SUVs Ranked by Fuel EconomyFord Escape Hybrid: 34 city, 30 hwy, 32 combined mpgMercury Mariner Hybrid: 34 city, 30 hwy, 32 combined mpgMazda Tribute Hybrid 2WD: 30 city, 34 hwy, 31 combined mpgSaturn Vue Green Line Hybrid: 25 city, 32 hwy, 28 combine mpgMazda Tribute Hybrid 4WD: 27 city, 29 hwy [link widoczny dla zalogowanych], 27 combined mpgChevrolet Malibu Hybrid: 24 city, 32 hwy, 27 combined mpgToyota Highlander Hybrid: 27 city, 25 hwy, 26 combined mpgLexus RX 400h: 26 city, 24 hwy, 25 combined mpgChevrolet Tahoe/GMC Yukon: 21 city, 22 hwy, 21 combined mpg
According to the EPA, their estimated combined mpg is calculated by assuming 55 percent city driving and 45 percent highway driving. You can calculate combined mpg using the equation
Toyota Highlander
Vehicle Emissions Rating
2008 Hybrid SUVs Ranked by Emissions Ratings (According to the Union of Concerned Scientists)
Read on
Selecting a Clean Diesel SUV for Fuel Economy
Hybrid SUVs: Is Better Gas Mileage Worth Cost?
Top Selling Hybrid Vehicle Models


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