The Russians are well supplied for this adventure. A few distribution problems are to be expected in war and only a fool would think an oil producing nation would run out of fuel.
How will they get the fuel inside the cities?
Unless they have EVs, I think that will be a real problem.
Do you know what month in WW2 the German Army reached its peak in numbers of panzers? January, 1943. The same month Stalingrad fell. The Germans had the most tanks they ever did, but they lacked the logistics to field and support large combined arms formations at the far south-eastern end of the front, and they spent the month retreating from the Caucuses and the Don.
The Russian Army has serious logistics shortcomings: Feeding the Bear: A Closer Look at Russian Army Logistics and the Fait Accompli. They should win eventually, but if the Russians were foolish enough to fill the entire road with stationary vehicles, so that the already inadequate number of supply trucks cannot reach their units, drop off supplies, and go back for more, well a miles long column of stalled, unfueled vehicles is exactly what one would expect.