BP said that it has approached the Trading Standards Institute offering to put its research and development facilities behind the investigation. BP’s scientists are on standby depending on the response from investigators.

When revealing its offer of assistance in a statement, BP also took the opportunity to point out that its petrol had not been affected and that it operates a thorough quality assurance process.

BP’s offer comes after many hundreds of motorists in the Southeast of England reported vehicle problems after filling up at supermarket forecourts. Speculation suggested that contaminated fuel was involved, but both Tesco and Morrison said that tests on their fuel were negative for anomalies.

The UK authority Trading Standards has now become involved and testing is ongoing.

Meanwhile, the oil companies have been accused of profiteering, as fuel prices have risen by up to three pence per liter in the wake of the crisis, while more business has come their way because motorists have been avoiding the supposedly affected supermarket retailers.