China’s biggest oil refiner is signalling the nation is headed to its peak in diesel and gasoline consumption far sooner than most Western energy companies and analysts are forecasting.

If correct, the projections by China Petroleum & Chemical Corp, or Sinopec, a state-controlled enterprise with public shareholders in Hong Kong, pose a big challenge to the world’s largest oil companies. They’re counting on demand from China and other developing countries to keep their businesses growing as energy consumption falls in more advanced economies.

"Plenty of people are talking about the peak in Chinese coal, but not many are talking about the peak in Chinese diesel demand, or Chinese oil generally," said Mark C. Lewis, an analyst at Kepler Cheuvreux in Paris who has written on how oil companies should broaden their activities to produce all forms of energy. "It is shocking."

Sinopec has offered a view of the country that should serve as a reality check to any oil bull. For diesel, the fuel that most closely tracks economic growth, the peak in China’s demand is just two years away, in 2017, according to Sinopec Chairman Fu Chengyu, who gave his outlook on a little reported March 23 conference call.

The high point in gasoline sales is likely to come in about a decade, he said, and the company is already preparing for the day when selling fuel is what he called a "non-core" activity.

That forecast, from a company whose 30,000 gas stations and 23,000 convenience stores arguably give it a better view on the market than anyone else, runs counter to the narrative heard regularly from oil drillers from the US and Europe that Chinese demand for their product will increase for decades to come.

"From 2010 to 2040, transportation energy needs in OECD32 countries are projected to fall about 10 per cent while in the rest of the world these needs are expected to double," ExxonMobil said in a December report.