Reducing engine idling saves fuel, reduces maintenance costs and cuts emissions.

A heavy duty truck or bus, diesel engine that is idling uses 2 litres of fuel an hour. By cutting idling you can save up to 5% of your fuel bill. For a large truck travelling 100,000 km per year, the savings from reduced idling could be worth $3,000 per year.

The 3-minute rule

Modern diesel engines only need to idle while air pressure builds up. An engine uses a bit more fuel during start-up, so it’s common to allow engines to idle when drivers make short stops. But if a driver expects to park for more than 3 minutes, it’s good practice to turn the engine off.

How to reduce idling

A campaign to target idling is a good way to get some quick savings and provide for great feedback specific to individual drivers. To remain effective you need to reinforce the, reduce idling message at regular intervals.