Is there a way to make the Japanese come to terms with the USSR (I know they hated each other in OTL), so they could get oil from them?
Or would this not be within the logistical capability of the USSR (they would have to ferry it by train to Vladivostok, right?)?
As a matter of fact, Japan received a small but significant amount of oil from wells in Soviet-controlled northern Sakhalin.
The wells were developed in the early 1920s, when Japan occupied all of Sakhalin.
In the mid-1920s, under mainly U.S. pressure, Japan withdrew to southern Sakhalin (acquired in 1905). Part of the withdrawal deal was that Japan would get the oil from those wells. AFAIK, the oil deliveries continued right up to 1945.
As for more oil from further inland - the Siberian oilfields are in West Siberia, thousands of kilometers from Vladivostok, and had not been much explored at the time anyway. Also, the USSR would have demanded full payment for the oil, and Japan was out of money.