2010 ALD Automotive/TOTAL ECO10 MPG Marathon under starter's orders
Driving everything from a Volkswagen Polo 1.2 BlueMotion to a Megane Renaultsport 250, this year's entrants – including our very own Fleet World editor Steve Moody and editor-at-large Ken Rogers – will be putting both their eco-driving credentials and those of the vehicles to the test over a 400-mile round route from Stratford upon Avon.
As usual there'll be two awards – one for the Best Outright Fuel Consumption and the other for the Best Percentage Improvement.
Unlike other motoring races, there's no screeching past the chequered flag at the end or a triumphant, champagne-soaked prizegiving event on the podium but a rather painstaking process of measuring the fuel used in the cars to work out their average mpg and generate meticulous results.
To find out more about the winning cars and their unassailable fuel-sipping skills, keep watching this space.