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An interetsing choronologic list of the missions of the Allied air force against the Nazi oil industry.
I know its wiki, but this being a chronology, it's pretty accurate.
Oil campaign chronology of World War II - Wikipedia
It could be argued (and has been) that the Transportation Plan was more important than the Oil Campaign, however I think the Red Army secured the Soviet victory.What is amazing is the huge amounts of stocks of oil the Germans accumulated just prior to June 1944 and then how rapidly those stocks declined as production reduced due to bombing.
How did they achieve this accumulation? One could argue that the UK/US oil Offensive secured a Soviet victory.
It could be argued (and has been) that the Transportation Plan was more important than the Oil Campaign, however I think the Red Army secured the Soviet victory.
I would submit that targeting the electrical power grid would have had more effect and been more crippling.
The German electric power situation was in fact in a precarious condition from the beginning of the war and became more precarious as the war progressed; this fact is confirmed by statements of a large number of German officials, by confidential memoranda of the National Load Dispatcher, and secret minutes of the Central Planning Committee. Fears that their extreme vulnerability would be discovered were fully discussed in these minutes.
The destruction of five large generating stations in Germany would have caused a capacity loss of 1.8 million kw. or 8 percent of the total capacity, both public and private. The destruction of 45 plants of 100,000 kw. or larger would have caused a loss of about 8,000,000 kw. or almost 40 percent, and the destruction of a total of 95 plants of 50,000 kw. or larger would have eliminated over one-half of the entire generating capacity of the country.
The shortage was sufficiently critical so that any considerable loss of output would have directly affected essential war production, and the destruction of any substantial amount would have had serious results.
Major Strategical Flaw of World War 2: Failure to Target Germany's Electrical Power Grid | History Forum (historum.com)
I would go so far as to say that without the allied oil (and transport campaign) the Soviets would have been contained another year.
The Attack on Oil was more than on just aviation fuel. It also didn't start in earnest til '44.
"Generating and distributing facilities were relatively vulnerable and their recuperation was difficult and time consuming. Had electric generating plants and substations been made primary targets as soon as they could have been brought within range of Allied attacks, the evidence indicates that their destruction would have had serious effects on Germany's war production."