As of 2013, which of the following oil refineries of India had the maximum capacity?

Among the listed refineries, Koyali (Gujarat Refinery) had the largest installed capacity in 2013, about 13.7 million tonnes per year, against about 12 for Trombay (BPCL Mumbai), 8 for Mathura and 6 for Barauni. Jamnagar, which is not listed, was already larger, so Koyali was the largest only among these options.

Current law: Gujarat Refinery's design capacity remains 13.7 million tonnes per year, with an expansion to 18 million tonnes per year under way.