China’s gasoline exports in November nearly tripled from a year ago to an all-time high, as refiners processed crude at near record rates to take advantage of sturdy profit margins at home although domestic demand for the motor fuel remained sluggish.

Gasoline shipments were 1.84 million tonnes last month, data from the General Administration of Customs showed on Monday. That compares to the previous record at 1.73 million tonnes in October and 630,000 tonnes in November 2018.

Diesel exports climbed to…