Diesel often gets a bad rap for being a dirty fuel, but the facts are that modern diesel engines are both very economical on fuel and clean due to high technology filter equipment. According to the NRMA, diesel cars are more fuel efficient and emit less carbon dioxide - which is a big plus for the environment. Another benefit of a diesel engine is the additional torque (or pulling power). Diesel is a great choice if you are considering towing, carrying a heavy load or moving your big family. Diesel also tends to be more stable in terms of price compared to petrol and often you can get up to twice the distance from a tank of fuel. It is well known that diesel engines last a lot longer than petrol engines. With a better longevity record, resale values will also be higher on most models particularly when the kilometers get higher. A recent trade in of ours was a 2008 Toyota Prado auto diesel wagon with 391000 kms. It still has a market value just under $20000. A similar petrol engine car would be worn out and worth much less than half that figure. Diesel engines can be more expensive to service. Modern diesel cars have a particulate filter to remove any nasty nitrogen dioxide particles. Regular highway style driving clears those filters. Driving short, start stop distances in a diesel car can block up the particulate filters and potentially cause an expensive next service. So, there are many benefits of a diesel engined vehicle for you to consider. If you travel high kilometers, have a large family or will be transporting or towing heavy loads, then diesel is a good choice. If, however, you're wanting a small car for mostly city use then do your sums before choosing diesel over petrol.