... efficient car, there are plenty of things to keep in mind. First, you will want to examine the specific hybrids estimated gas mileage and be sure to ask when the gasoline engine kicks in, too. You may find that if you drive a lot of highway miles at faster speeds and the gas engine kicks in at 35 mph, you may not save as much money on fuel as you expected. Youll also want to consider any tax saving credits that being offered. There is a federal income tax credit (up to $3,400) given on the first 60,000 hybrid models sold. After that benchmark is met, the credit is gradually phased... ...