![]() ![]() ![]() When the fuel burns, the carbon combines with two oxygen molecules (both of which are heavier than the carbon) to create carbon dioxide. To understand why the total carbon dioxide produced is heavier than the original litre of fuel, we have to look at the chemistry: diesel and petrol are full of carbon, but carbon is quite light. For example, a Ford Ranger produces between 218 and 230g/km using the given combined fuel economy of 8.3-8.8 litres per 100km. The more fuel you use per kilometre, the more carbon dioxide is produced per kilometre, and this figure is often given by car manufacturers. The amount of CO2 you create while driving is related to your fuel economy. This CO2 is created in the combustion process in your engine and it’s a potent greenhouse gas. A litre of diesel, which weighs around 840g, produces even more – 2.68kg of carbon dioxide. One litre of petrol weighs around 740g but produces around 2.31kg of carbon dioxide when burned.
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