Do not know who quoted it but the number appears to comes from BP. YOU KNOW, AN OIL COMPANY a decade ago.
The world has 53.3 years of oil left
Matt DiLallo
The Motley Fool
june 28, 2009
BP (ticker BP ) has provided an intriguing update to its global oil reserves estimate in the company's latest yearly review of energy statistics. BP raised its reserve estimate by 1.1% to 1,687.9 billion barrels, which is enough oil to last the world 53.3 years at the current production rates. However, there's likely a lot more oil left in the tank beyond what BP sees today.