The expiry of a US waiver for Russian oil purchases may tighten the availability of medium, sour grades for India, senior refining officials say.

India's oil refiners are prepared for changes in Russian crude supply. Weaker domestic demand and available oil from the US and Middle East offer alternatives. China's reduced…

The expiry of a US waiver for Russian oil purchases may tighten the availability of medium, sour grades for India, senior refining officials say.