IOC said even after today's increase, oil firms will have an under-recovery (revenue loss) of Rs 5.71 a litre on diesel.
Diesel rates had risen regularly barring just one time.
Oil companies skipped raising diesel prices in April 2013, when assembly elections were held in Oil Minister M Veerappa Moily's home state Karnataka.
However, they made up by hiking diesel prices by 90 paise in the following month.
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