Deleted member 1487
From OP:
http://www.airpower.maxwell.af.mil/airchronicles/aureview/1981/jul-aug/becker.htm
However that then prevents the Caucasus campaign as conducted IOTL; the original plan to seize and secure Stalingrad first if the attack is even launch at all would stay the plan, rather than revising it to take the oil as quickly as possible. Don't split AG-south until Stalingrad falls and only advance to Maykop in 1942 IF that was even part of the plan ITTL with oil resources being secured. If its not the plan then perhaps Stalingrad is the halt line.
Instead this happened IOTL:
http://www.airpower.maxwell.af.mil/airchronicles/aureview/1981/jul-aug/becker.htm
Matzen alone would cover that gap if the May 1941 study claimed the military needed 87 million barrels a year to cover military needs. However that was with the expansion of the synthetic oil industry from 1938-43. With Schoonebeek, Matzen, and part of the Hungarian output, plus maybe some more from Romania if given the requested coal there would likely still need to be some expansion of synthetic oil output, but it would be fine with the expansion to 1943. So the historic investments up to then would probably still have to happen, but then needs with be met by all sources until bombing in 1944 wrecked them.Still, between 1938 and 1943, synthetic fuel output underwent a respectable growth from 10 million barrels to 36 million. The percentage of synthetic fuels compared to the yield from all sources grew from 22 percent to more than 50 percent by 1943. The total oil supplies available from all sources for the same period rose from 45 million barrels in 1938 to 71 million barrels in 1943.27
However that then prevents the Caucasus campaign as conducted IOTL; the original plan to seize and secure Stalingrad first if the attack is even launch at all would stay the plan, rather than revising it to take the oil as quickly as possible. Don't split AG-south until Stalingrad falls and only advance to Maykop in 1942 IF that was even part of the plan ITTL with oil resources being secured. If its not the plan then perhaps Stalingrad is the halt line.
Instead this happened IOTL: