By all accounts, they are frequently running out of fuel. Which is the most basic, obvious, and also quite readily available in Russia. How bad can an invasion

By all accounts, they are frequently running out of fuel. Which is the most basic, obvious, and also quite readily available in Russia. How bad can an invasion go if you run out of fuel on the way to your initial target? I have heard rumors, that some troups just sold off fuel on the black market before the invasion started. Whether that was just corruption or planned sabotage, no one of course knows.