A new campaign by Shell has indicated that regular drivers could save £544 over a 12-month period if they make simple changes to the way they drive.
The savings could help cover the cost of a van insurance policy.
The Smarter Cab Drivers campaign shows that a collective total of £18.5 billion could be saved by the 34.1 million motorists in the UK if they adopt techniques to reduce fuel consumption.
Cab drivers who took part in the campaign reported a 20% reduction in their fuel consumption over the last month.
If they maintain the same level of fuel-efficient driving all year round, each driver could save up to £1,552, according to Shell.
Simple steps that can be adopted by motorists to cut fuel consumption include minimising the load in their boots, turning down the air conditioning and avoiding over-revving.
Matthew Taylor, chief executive of the Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA), said: "Behaviour change can sound like a technocratic idea, but our work with the taxi drivers shows that change is something best done with people. By understanding the factors that shape their driving habits, the taxi drivers have been able to make real improvement in their fuel efficiency without having to become environmental saints."
© Press Association 2011