It has now been revealed that Warren Buffett's oil sands exposure has increased again, with his 40.1 million share purchase of Exxon Mobil, one of the world's leading producers and a major player in Alberta's enormous bitumen play through its 70% stake in Imperial Oil.

This is Buffett's second recent high-profile oil investment, the first being in June when Berkshire Hathaway announced it had taken a $500-million stake in Suncor Energy Inc., the world's leading oil sands producer and Canada's largest integrated operator.

Tellingly, Buffett increased his stake in Exxon Mobil right around the time it was acquiring the enormous Clyden in-situ bitumen project from ConocoPhillips - a company whose stock he just sold, reducing his holdings in it by 44 percent.

ExxonMobil/Imperial also owns the Kearl project - another massive Alberta-based bitumen project with 4.6 billion barrels of bitumen resource and a project lifespan of over 40 years. Production is already at 80,000 barrels per day.

In short, Buffett's ExxonMobil stake gives him ownership in Imperial Oil - one of Exxon Mobil's jewels-in-the-crown, partly because of its enormous Canadian oil sands position.

Ron Daems, President of Strata Oil, provided these comments to shareholders:

"Strata Oil views Buffett's increased stake in ExxonMobil as good news for Alberta's bitumen producers, and a real endorsement of the future potential of the resource. Many of the leading 'Carbonate Triangle' companies have already attracted the investment dollars of some of the world's major investment institutions including Warburg Pincus, Blackstone Capital, and Goldman Sachs. But there's no doubt that Buffett's $3.45 billion stake in ExxonMobil/Imperial and his earlier $500 million stake in oil-sands producer Suncor is the kind of good news that really bodes well for Alberta's bitumen production," said Mr. Daems.

"All these developments mean that momentum is building in Alberta's bitumen carbonate play, and Strata Oil has one of the largest and most attractive projects in the industry. We acquired our project in 2005 and 2006, making us one of the earliest companies to position in the carbonates. Through drilling and geological analysis, we now have a recoverable resource of 887 million barrels of crude, and a total resource of 3.4 billion barrels. We believe our company offers substantial value to its shareholders."

Strata Oil's Cadotte Central project is estimated to have a Net Present Value (NPV) of USD $1.3 billion. Its newly updated total of 887 million bbls of recoverable bitumen provides significant additional upside potential which hasn't been factored into the $1.3 billion calculation yet.

Strata Oil is 100% owner of the Cadotte project, in the Peace River region of Alberta.