More than 150,000 people every year put unleaded petrol into diesel cars, with repair bills often running into thousands of pounds. But avoiding misfuelling just got a whole lot easier with the arrival of the new and improved aftermarket cap.

More than 150,000 people every year put unleaded petrol into diesel cars, with repair bills often running into thousands of pounds. But avoiding misfuelling just got a whole lot easier with the arrival of the new and improved aftermarket cap.