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- The key feature of a hybrid engine is its ability to switch between the gasoline-powered internal combustion engine and the electric battery when needed. When the vehicle stops at a traffic light, for example, the internal combustion engine shuts down and the vehicle switches to the electric battery.
- Purchasers of vehicles with hybrid engines are eligible for a tax credit of up to $3,400 from the federal government. These credits phase out as the manufacturer reaches the limit of 60,000 hybrid vehicles sold.
- Auto manufacturers have a combined total of 30 different models of hybrid vehicles available for sale for the 2010 model year. These range from the Honda Insight, a compact car available for less than $20,000, up to the Mercedes Benz S400, a luxury vehicle listed for $87,950.
- Hybrid engines are environmentally cleaner because the engines emit less carbon dioxide per mile driven than a vehicle powered with only an internal combustion engine. This is due to its using less gasoline or diesel fuel.
- Vehicles with hybrid engines get higher mileage per gallon since less gasoline is burned. The 2010 Toyota Prius, a 4-cylinder hybrid vehicle, has been rated at 51 miles per gallon for highway driving and 48 miles for city driving.















