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The 2007 United Kingdom petrol contamination problem arose on 28 February 2007 when motorists in South East England reported that their cars were breaking down. This was caused by silicon-contaminated unleaded petrol, sold by several supermarkets, that damaged the Lambda sensors in engine management systems. ==The problem== On 28 February 2007 motorists in South East England reported that their cars were breaking down. Motorists blamed supermarket petrol with most of the fuel sold by the supermarkets in the South East coming from the Vopak terminal in the Thames Estuary. Harvest Energy, which supplies Asda,〔("Supermarkets withdraw fuel over silicon" ), The Guardian, 3 March 2007〕 shares tank facilities at the depot in West Thurrock with another oil company, Greenergy,〔("Thousands of drivers 'sold suspect petrol'" ), David Millward, Daily Telegraph, 1 March 2007〕 which is part-owned by Tesco and supplies both Tesco and Morrisons.〔("The great petrol mystery splutters on" ), David Derbyshire, Daily Telegraph, 2 March 2007〕 Then on the evening of 2 March scientists who had been testing the petrol reported finding traces of silicon in the fuel〔("UK petrol probe finds silicon in fuel" ), Reuters, 2 March 2007〕 which were subsequently tracked down to four storage tanks by Harvest Energy.〔("Rogue fuel traced to depot tanks" ), BBC News, 3 March 2007〕 Morrisons immediately announced that it was to stop selling unleaded petrol at 41 outlets supplied by the Vopak terminal while Tesco was emptying and refilling tanks at 150 petrol stations but was not suspending sales.〔("Firms curb supplies in fuel scare" ), BBC News, 2 March 2007〕 The following day Asda said it was replacing unleaded petrol at the 30 forecourts in the South East as a "precautionary measure".〔("Petrol contamination traced to four tanks" ), Evening Standard, 3 March 2007〕 By Sunday, 4 March, tests from Tesco and Asda had found contamination of silicon in unleaded fuel.〔("Fuel damage drivers set for legal fight" ), The Guardian, 4 March 2007〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「2007 United Kingdom petrol contamination」の詳細全文を読む スポンサード リンク
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