
Can you save fuel by slipstreaming other vehicles?
We got a little convoy, ain't she a beautiful sight.
Asked by: John Russell, Inverness
Yes, vehicles create a region of relatively low-pressure air behind them, and it is indeed possible to reduce fuel consumption by getting into this ‘slip-stream’. According to research published last year by the University of Aachen, Germany, lorries can save around 17 per cent in fuel by tailgating each other. Don’t try it yourself, though.
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.
Authors

Robert is a science writer and visiting professor of science at Aston University.
Subscription offer
Subscribe and try your first 3 issues for just £5. After your introductory period you will pay just £22.99 every 6 issues by Direct Debit. Receive every issue delivered direct to your door with FREE UK delivery.