Britons waste £337 million on fuel each year by driving on under-inflated tyres, according to Michelin.
The tyre manufacturer revealed that 39% of motorists are driving on dangerously under-inflated tyres, while 5% are driving vehicles which have punctured tyres.
These motorists are subsequently working their way through an extra 244 million litres of fuel per annum which is causing an extra 600,000 tonnes of carbon dioxide to be emitted into the atmosphere.
Driving on under-inflated tyres also has ramifications for breaking distances, handling and tyre durability, which could also have an averse effect on the cost of van insurance.
Phil Baldock, Michelin's head of communications, said: "It's crucial that drivers understand the importance of driving with the correct tyre pressure. Under-inflated tyres can not only put lives at risk but they increase the stress on a vehicle's steering and suspension, cause it to use more fuel and thus produce more CO2.
"Not only does the right pressure improve safety, it is beneficial for their bank balance to have correctly inflated tyres and it also helps the environment."
© Press Association 2011