When it comes to fuel efficient and luxury cars the best bet is to compare hybrid-engine designs. More and more luxury car companies are now coming out with fuel efficient hybrid-engine designs.
The following link will take you to a site that lists the best--and worst-- fuel efficient cars. www.fueleconomy.gov/feg/bestworst.shtml
http://www.fueleconomy.gov/feg/best/bestworstnf.shtml is the government website for fuel rankings and this is the direct link to the list of the most fuel efficient cars!
The Toyota Yaris and the Honda Fit are rated among the best fuel efficnet cars. Additional information follows: www.newcars.com/green/fuel-efficient/index.html
There are several places you can look online to find a list of the most fuel efficient cars. Check FuelEconomy.gov, they have a pretty extensive list. CNN recently did a story on the eight most fuel efficient cars. Check out their report.
Well, I would recommend purchasing fuel efficient cars manufactured by Ford because they offer a variety of services and vehicles for an incredibly reasonable price.
Fuel is so expensive these days that finding the best MPG cars has become a necessity. As well as learning the most fuel efficient way to drive, checking the motoring magazines and comparison sites can help you to find the best fuel efficient cars to suit your lifestyle.
US News has the ranking for the best efficient cars. You can read them at http://usnews.rankingsandreviews.com/cars-trucks/rankings/Affordable-Small-Cars/
The best car you could get that is fuel efficient is any form of hybrid. They combine electricity and fuel to put out amazing gas mileage. When the electricity runs low the gas kicks in.
The most energy efficient car available is the Toyota Prius. Please see the following, for additional information: www.thesupercars.org/top-cars/most-fuel-efficient-cars
BMW and Ford are the best from what I have read. Most of the big ones now have good fuel efficient cars though. Check out www.motortrend.com for more information.
The absolute best cars in terms of fuel efficiency are the newest fully electric vehicles. As they don't run on any gasoline at all, there is really no comparison for these.