Yes that's right, the base metal element lead, Pb, or more exactly the lead-based chemical compound Pb(CH2CH3)4 added to petrol to make car engines run more smoothly.

BBC: Does lead poisoning make you violent?

The Commerce Department added that if petrol, as well as auto purchases, were excluded then July's retail sales would have remained unchanged.

BBC: NEWS | Business | US car sector drives retail sales

"His complacent attitude will dismay families across Scotland who are day and daily struggling to reconcile their need to use a car with spiralling petrol prices, " he added.

BBC: Motorists hit by petrol 'rip-off'

He said he travelled to many sites on the route and although the cost of petrol was a "slight problem" it was the car parking costs that "soon added up".

BBC: England