During the war Germany operated 16 Coal Gasification Plants that
produced synthetic fuel. 85% of German aviation ran off synthetics, as
did much of the German war machine in general.
The SS Scientific Branch further developed coal-burning powerplants as
well as exploring grain alcohol fuels, Hydrogen peroxide turbines, and
free energy machines like Hans Coler's designs as well as Schaubergers
vortex motors that ran off water, air, and a crystalline substance.
What you are quoting is pre-war oil sales to Germany and Germany's
strategic reserves during the opening of the war. As the war
progressed, however, Germany was dependent on synthetics, captured oil
fields, and coal burning engines. Some German Kubelwagens were even
converted over to coal burning engines while others were used to power
searchlights and run machinery.

Rob

p.s. After the war one of the German coal gasification plants was
actually transferred to Texas and research-operated for years before
being shut down and filed away by the US oil industry. Synthetics have
always been possible but the avg price of a barrel of synthetics is at
least double or triple the price of a barrel of crude oil. That's why
we are still dependent on foreign oil.