 The German pilots themselves learned a few tricks from their enemy. Oil freezing in the DB 605 engines of the Bf 109G-6s made them difficult to start in the extreme cold of the Russian winter. A captured Soviet airman showed them how pouring fuel into the aircraft's oil sump would thaw the oil and enable the engine to start on the first try. Another solution, also learned from the Soviets, was to ignite fuel under the engine.
