Moscow announced the extension on Saturday. Diesel, gasoil and marine fuel stay banned for export by the refineries that make them, through 30 September inclusive; the government cited a stable domestic market, seasonal demand and unplanned repairs.
The repairs are no mystery. Reuters counted all of Lukoil's major Russian refineries out of operation at the end of August, and the Kirishi plant burned after a drone strike on the night of 29 August, by the regional governor's account.
The August surprise has become September policy.
One channel stays open. The decision does not touch shipments under intergovernmental agreements, so where the region's tonnes ride treaty balances, the pipe remains legally live. Where they ride the open market, September is shut.
The exposure map is already in the file. Tajikistan imported 599,500 tonnes of oil products in the first half of the year, about 90% of them Russian, by its customs service's own count. Mongolia's task force puts September demand at roughly 150,000 tonnes of diesel against 65,000 of petrol, and Kyrgyzstan has extended its compensation wall through 31 December, with diesel's reference price fixed at $1,050 a tonne.
Each capital moved first. Bishkek extended its subsidy to New Year's Eve and priced it in dollars. Ulaanbaatar took a fuel pledge from Xi Jinping this week. Dushanbe has an ask in at Tehran, examined below.
The August surprise has become September policy. A ban renewed 2 days before its own expiry is a market signal in the shape of a calendar: importers get to plan exactly one month ahead.
The watch date is now 30 September. An extension past it would push the wall into the heating season, when the region's diesel demand peaks and every substitute costs more.