There are many pictures and videos of trucks transporting oildrums and jerry cans and simply considering the distances involved... Just wow. But what were the numbers actually like?
Edit: I'd also be interested in the same question applied to other theaters and times in the war.
You might actually have to do some semi-original research to answer a question like this.
Works on logistics tend not to have a broad popular audience, and until the last few decades, candid Soviet sources weren't very available to English language authors. Unless someone like David Glantz has a chapter that covers this, a technical account of Soviet logistics in 1945 may just not exist in English. Or perhaps there is an obscure article in the Journal of Slavic Military studies.
The Soviet logistical situation in 1945 is really important though, because it's a key element of their political behavior at the dawn of the postwar era.