That depends on the type of hybrid. Hybrid just means a mix of propulsion systems but these days usually refers to gas/electric combinations such as the Prius or Insight. Some like the Accord were designed to give better performance than high mileage. Most high mileage hybrids these days are getting between 35 and 45 combined city/highway mpg.
The best mileage on any car usually comes from a hybrid car. The toyota prius and honda civic hybrid cars offer excellent gas mileage.
There is no "average" mileage for a hybrid. Hybrid is a type of drivetrain, so the question would be like asking what the "average" mileage for a gasoline car is, or a diesel car is. You would need to know what vehicle you wanted to know the mpg on. The 2008 Toyota Prius averages a combined 46mpg, which the 2008 GMC Yukon 1500 Hybrid 2WD averages 20mpg.
Gas mileage for hybrid SUVs varies depending on the model of SUV and the manner in which the vehicle is driven. In general, hybrid SUVs have gas mileage rating comparable to or better than standard SUVs.
The gas mileage the hybrid Honda Accord will get on the highway is 45 mpg. The gas mileage in the city is 49 mpg and the combined gas mileage is 47 mpg.
Hybrid cars wil get better mileage under highway driving conditions as is the case with most cars. Stop and go city driving uses a decrease in efficiencey in any vehicle type.
The lower mileage range of hybrid gas mileage tends to be around 20-25 mpg. As for the higher end range you can get from 40 to 50 miles per gallon.
The Polo, a model of Volkswagen, is a new hybrid type automobile that features a petro-engine and a 45 miles to the gallon. The mileage makes the car worth the price.
I would go with the Prius Hybrid from Toyota. From what my friends have said, it is a great car as well as good gas mileage. If not, all other hybrid cars are great as well.
If your SUV gets only 15 mpg, the same 12,000 miles would require 800 gallons, ... gas mileage for some of the most popular hybrid and non-hybrid SUVs.
I think the Prius is the hybrid car with the best mileage. I have shopped many websites looking for them, and overall they are the best. Of course, the smartcar is good too.
The major benefit to owning a hybrid is the major boost in gas mileage you'll enjoy over a more "traditional" car. You may as well do what you can to boost this mileage further by looking into small hybrid cars. The lower weight of these cars means that they get much better mileage.
A smaller car with 3 or 4 cylinders usually gets the best gas mileage. Also, hybrid cars tend to get better mileage on the city streets than regular cars because of their regenerative braking.