Diesel versions are usually more fuel-efficient than petrol versions of the same car model. However, they emit greater air pollution rating — the one-star list is entirely made up of diesel vehicles, mainly large 4WDs. Why go green?

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Driving Tips

A more fuel-efficient vehicle will generate fewer greenhouse gases over the same distance compared with a gas-guzzler. But your personal carbon footprint can be reduced even further if you choose public transportation. The use of a personal vehicle is obviously one of the greatest polluters, because emissions from millions of vehicles on the road add up. Transportation emissions are a result of two factors: the fuel efficiency of the vehicles in use, and the availability of alternatives to driving alone.
Bundle Errands
When you start your car after it's been sitting for more than an hour, it pollutes up to five times more than when the engine is warm.
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Save Fuel by Slowing Down
Hard acceleration and braking can waste fuel and lower your kilometres travelled by 33% on the highway and 5% around town.
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Get Rid of Unnecessary Weight
Avoid keeping unnecessary items in your vehicle, especially heavy ones. An extra 45kg in your vehicle could reduce the amount of kilometres you get out of a litre, by 2% or more for small cars.
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Maintain Your Car Regularly
A car service could boost your kilometres per litre anywhere from 4 to 40%; a new air filter could get you 10% more kilometres per litre. 
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