Thousands of motorists from 10 cities across Europe and Asia, including over 200 from the UK, helped Shell set a new Guinness World Record for the "largest fuel efficiency lesson".
Experts advised motorists on various measures which can be adopted to cut down their fuel bills during the training sessions that were held simultaneously in different parts of the world.
With fuel prices rising at a sharp rate, being fuel efficient might help motorists to save cash which could then be put towards things likecar insurance.
TV motoring expert Quentin Willson and presenter Konnie Huq hosted the UK leg of the event at Potters Fields Park, near Tower Bridge in London.
X Factor chart topper Alexandra Burke gave a live performance at the UK venue.
Amarilis Whitty, Guinness World Records adjudicator, said: "As world record attempts go, this is one of the most informative I've witnessed. Now more than ever, it's a hugely important topic for families and motorists across the world."
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