It has been well-documented over the past couple of years that the world's fuel supplies are running out. This particular factor, coupled with attempts to cut carbon dioxide emissions, has led to a clamour for fuel-efficient cars.
Many of the world's biggest car manufacturers have taken on this growing demand for fuel-efficiency, with each producing their own ranges of fuel-efficient cars. But which are the best fuel-efficient cars?
Here are just six of the best:
Audi A1 - Fun, sophisticated and most importantly very fuel efficient, the Audi A1 is certainly one of the best fuel-efficient cars. In particular the A1 1.4 TFSI - a model which sits in road tax band D - is capable of achieving a fuel-efficiency rate of 53.3 mpg (miles per gallon), which makes it a fantastic option for those looking for an upmarket car.
BMW 3 Series - An executive saloon that also happens to be one of the cheapest to run - an important factor to consider - the BMW 320d Efficient Dynamics model averages a massively impressive 62.8 mpg; whilst its spacious interior is well worthy of a business executive.
Chevrolet Volt - A comfortable hatchback that also benefits from being one of the best fuel-efficient cars, the Chevrolet Volt primarily uses an electric motor but also possesses a petrol engine as a back-up - meaning that any range-related anxiety can be eradicated. It has been claimed that the car is capable of producing a jaw dropping fuel-efficiency rate of 235 mpg.
Volkswagen Golf - Well-known and driven by car owners across the globe, the newest models of the VW Golf retains the classy practicality of their predecessors, but also improves on them by offering great fuel-efficiency rates. The 1.6 TDI 105 Bluemotion Tech Match 5dr model can average 68.9 mpg, which although not as impressive as the claimed rate of the Chevrolet Volt, still makes it a fantastic option for those looking at fuel-efficient cars.
Volkswagen Up - Considered by many people to be one of the best city cars available, the VW Up is a funky-looking car which is great to drive.
Agile with a quiet engine, it is possible to achieve a fuel-efficiency rate of 60.1 mpg - providing you go for the 1.0 75 High Up version. Although a relatively small hatchback, the Up also possesses a reasonable amount of space - certainly enough for a few passengers and their luggage - a factor that also gives it incredible versatility; this is also something considered by many when looking for fuel-efficient cars.
Peugeot Hybrid4 - A car that has been in the works for around three years, the Peugeot 3008 Hybrid4 is one that looks as normal as standard cars do; there are no panels boasting futuristic designs and there are no space-age controls, it is - simply put - a very good hybrid car.
Its 2.0-litre HDI engine ensures that it moves incredibly smoothly. Its fuel-efficiency rate is also reasonably good too - with an average of 49 mpg. The interior is stylish and roomy too - adding to the list of positives that can be attributed to this fantastic piece of engineering.
As awareness of environmental issues ever increases, more and more people are choosing fuel-efficient cars instead of traditional petrol or diesel-driven cars. This article looks at six of the best fuel-efficient vehicles, including hybrid vehicles and economical petrol cars.