By Maria Almenoar

Pump prices fell 10 cents on Monday morning - the biggest cut since August 2003.

This is the fifth price drop in the last 20 days, with Shell leading the way. This was followed by Caltex and Singapore Petroleum Company (SPC).

This brings 98-octane to $2.110 a litre, 95-octane to $2.036 per litre and 92-octane to $2.003 per litre. Ultra premium petrol like Shell's V-power is at $2.239 a litre and Caltex's Platinum is at $2.236 a litre - before discount.

Diesel also fell by 10 cents to $1.863 per litre.

SPC revised its pump prices across the board at 10 am on Monday.

Prices have eased recently while concerns mount about demand for oil in the face of prolonged weakness in the US economy, the world?s biggest energy consumer, analysts said.

Oil prices broke through the US$100 (S$135) level at the start of the year and then rose to a series of record highs on concerns about supply, stoked in part by tensions between the West and Iran over that country?s nuclear programme.

Unrest in key African producer Nigeria was another factor, analysts said.

The price of oil could drop to between US$70 and US$80 a barrel if the US dollar strengthens and concerns over Iran are reduced, Opec chief Chakib Khelil said on Saturday.