The dirty fuel problem that we highlighted yesterday has become a little clearer.
According to Autocar, the fuel may have been contaminated with anti-freeze. Motorists all over the country experienced problems after filling up from petrol stations situated mainly in the south-east. One PHer wrote that the problem had resulted in a damaged lambda sensor which had cost him £90 to replace.
Analysis by the AA suggest that the damage was caused by silicon or silicates, which can be found in anti-freeze but which is never found in unleaded petrol.
Some say that supermarket fuel is to blame -- one motor engineer wrote on PH's forums that oxygen sensor faults, burnt valves, catalytic converter faults and many other engine management problems have been found in cars filled with fuel from supermarkets but not from single-brand petrol stations.
Tesco issued a statement yesterday in which it denied responsibility: "We source from exactly the same suppliers and our fuel originates from the same depots as many of our competitors, and so if a problem did emerge it could not by definition be Tesco-specific."
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