 Sour grade crude oil is cheaper and helps improve refinery margins.
 India's oil refiners are looking to increase refinery margins and negate supply risks by upgrading their refineries so that they can process crude oil with higher sulphur content.

<tr><td><p class='TableClas'></p><P class='TableClas'><DIV CLASS=rightDiv><script language="JavaScript">
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		<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
		</script> </DIV><p class='TableClas'>India's oil refiners are looking to increase refinery margins and negate supply risks by upgrading their refineries so that they can process crude oil with higher sulphur content. These heavier grades of crude oil are around $3 per barrel cheaper than those with less sulphur.
</p><p class='TableClas'>Nearly 70 per cent of the crude oil that Indian Oil Corporation (IOC) 

PSUs to upgrade refineries to up margins

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