Reliance imported about 1.09 million bpd in January as it had cut runs at its older 660,000 barrels per day (bpd) plant by about 23 per cent from a year ago.
Its purchases also eased last month as crude inventory had built up after an emergency shutdown of a distillation unit in December.
The private refiner shipped in about 1.3 million bpd in December and a similar amount in January 2013, the data showed.
Billionaire Mukesh Ambani's Reliance operates two refineries at Jamnagar in Gujarat that can together process 1.2 million bpd oil.
Reliance also made a rare purchase of Canadian heavy oil Cold Lake in January and bought Kazakhstan's CPC Blend for a second month in a row, the data
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