Correction: March 12 Mars-related assessments

The following Platts assessments March 12, 2012, were corrected as follows:

Differential Outright Mars (May) $15.40/b $122.43-$122.45/b Mars (June) $14.65/b $122.20-$122.22/b

Basrah Light $16.40/b $123.43-$123.45/b

1st/2nd Mars O/R Spread Differential: -.66/b Americas Crude Marker (May) outright: $121.83-$121.85/b Americas Crude Marker (June)outright: $121.60-$121.62/b

The Mars assessments appears on Page 220. The Americas Crude Marker assessments appear on page 201. All others appear on page 214. These assessments also appear in Crude Oil Market Wire and the Oilgram Price report.

They assessments are in the Platts database under the following codes:

Mars (May) Differential: AAKTH00 Mars (May) Outright: AAMBU00 Mars (June) Differential: AAMBO00 Mars (June) Outright: AAMBX00

Basrah Light Differential: AAGWV00 Basrah Light Outright: AAEJH00

1st/2nd Mars O/R Spread: AAWFC00 Americas Crude Marker (May) outright: AAGVU00 Americas Crude Marker (June)outright: AAGVV00