Incorrect. This is one of the hardest myths to debunk, since it seems stuck in peoples' psyche.
The German tank line all used a single family of Maybach V-12 gasoline (petrol) engines, increasing in displacement as the tanks got bigger.
It's easy enough to look up.
The Americans, with the M4A6 diesel-engine Sherman, used more diesel tanks than the Germans. It's the Russians that went big on diesel tank engines during WWII.
That is, starting with the MkIII, their first true medium tank. I don't want to get tripped up with generalities. The earlier tanks used 4 and 6 cylinder gasoline engines.
The M4a6 was produced in limited numbers and never saw combat with the army in Europe. The M4a2 was powered by 2 straight 6 GMC diesel engines mounted side by side. This is the model of Sherman that we supplied 6000 to the Soviets. The U.S. Army did not use this Sherman model in Europe. The U.S. Marine Corp used the M4a2 in the Island campaigns in the Pacific.