India's crude oil imports jumped 14% year-on-year in April to 19.72 million tonnes, the highest since October 2018.
Oil imports from Iran had fallen 57% year-on-year in April after waiver from US sanctions on Iran ended recently.
The government had earlier this month it will decide on Iranian oil imports post elections.
Diesel imports also surged to about 250,000 tonnes, the highest since July 2017.
While monthly liquefied petroleum gas (LPG) imports fell more than 10%, but on a year-on-year basis they are up about 45%.
The country's demand for LPG had risen to a record in the fiscal year ended in March amid government measures to provide cleaner cooking fuel to rural households, and analysts expect consumption to keep rising.
The Total imports of refined product decreased marginally, down by about 0.7% from a year earlier.